BMW is set to add another variant of the Coupe and Convertible to the BMW 6 Series line-up with the arrival of the BMW 640d xDrive Coupe and Convertible in spring 2012. Intelligent all-wheel drive – making its debut in the BMW 6 Series – teams up with a six-cylinder in-line diesel engine featuring BMW TwinPower Turbo technology to take driving pleasure to another new level. The combination of a diesel engine and BMW xDrive all-wheel drive, which will also be found in the BMW 640d xDrive Convertible, gives the BMW 6 Series a spread of abilities none of its rivals can match.

The new BMW 640d xDrive Coupe accelerates from 0 to 100 km/h (62 mph) in just 5.2 seconds. The 230 kW/313 hp diesel powerplant uses
BMW TwinPower Turbo technology to ensure outstanding efficiency, and joins forces with the standard-fitted eight-speed Sports automatic gearbox to deliver exceptionally low fuel consumption and emissions. The xDrive system distributes the power generated by the engine precisely between the front and rear wheels as the situation demands. Pulling the strings behind the scenes is an electronic control unit which links xDrive up with the DSC (Dynamic Stability Control) system to ensure unbeatable traction, maximum safety, top-class handling and optimum power development in all weather and road conditions. The average fuel consumption of the BMW 640d xDrive Coupe stands at 5.7 – 5.8 litres per
100 kilometres / 48.7 – 49.6 mpg imp (in the EU test cycle, depending on the tyre format), while CO2 emissions are 149 – 153 grams per kilometre.


Six-cylinder in-line diesel engine with BMW TwinPower Turbo technology in the BMW 6 Series.

The instantaneous responses and pulling power of the diesel unit fitted in the BMW 6 Series enable it to do everything required of an engine fitted in a car with a sharp sporting focus. The output characteristics, acoustic profile, low vibrations and efficiency of the six-cylinder unit offer clear evidence of BMW’s expertise in the development of diesel engines.

Rewinding a generation, the introduction – for the first time – of a diesel variant into the previous BMW 6 Series likewise lent an extra dimension to the range. The new BMW 6 Series adds further lustre to the alluring profile of the exclusive and sporty, yet also economical, premium-class Coupe by taking performance and efficiency to new heights and, for the first time, offering the additional benefits of xDrive.

The latest generation of the most powerful diesel engine boasts displacement of 3.0 litres, a low-weight all-aluminium crankcase and the latest development of BMW TwinPower Turbo technology. This package of technology comprises multi-stage turbocharging and common-rail direct injection whose piezo injectors work with maximum pressure of 2,000 bar. The car’s two-stage turbocharging generates instantaneous and forceful power delivery, while the injection system sprays the fuel into the cylinders in precisely measured quantities to ensure clean and efficient combustion.


Two-stage turbocharging with optimised efficiency.

The latest multi-stage turbocharging technology responds more precisely than ever to the demands of different driving situations. At low revs a smaller turbocharger is activated, its low moment of inertia allowing it to go to work extremely rapidly. The compressed air from this small charger is sent directly to the combustion chambers via a bypass line. As the air no longer flows through the large charger, loss-free development of charge pressure is assured. Only when the driver asks for more power do the electronics prompt the bypass unit to bring the larger turbo into play. Added to which, variable turbine geometry for the smaller of the two turbos optimises the effectiveness of the turbocharging system in responding to the power requirement at any one time.

The result is an ultra-fast response to every movement of the accelerator. The engine delivers its peak torque of 630 Newton metres (465 lb-ft) as low down as1,500 – 2,500 rpm, with maximum output generated at 4,400 rpm. Powerful acceleration from a standstill and dynamic mid-range sprints are therefore dispatched with equal ease. The eight-speed Sports automatic gearbox is tuned precisely to the performance characteristics of the engine, and so allows the driver to exploit its impressive torque – maintained across a high rev band – to the full, for a sporty yet smooth driving experience. By contrast, in ECO PRO mode (likewise standard) the power reserves of the sporty diesel engine play a prominent role in ensuring a relaxed and extremely efficient driving style at low engine speeds.


BMW EfficientDynamics package of technology and Driving Experience Control come as standard.

ECO PRO mode, which is activated via the standard-fitted Driving Experience Control switch, carries out adjustments to the engine management, accelerator mapping and the shift characteristics of the automatic transmission. In addition, the output of electrically operated functions such as the climate control system, as well as the seat and exterior mirror heating are carefully regulated to ensure extremely efficient energy management. Special displays inform the driver of the extra range, in kilometres, achieved as a result. The BMW EfficientDynamics technologies fitted as standard on board the BMW 640d xDrive Coupe also include Brake Energy Regeneration, the Auto Start-Stop function, need-based operation of ancillary units and active air flap control.

The Driving Experience Control switch can also be used to call up SPORT, SPORT+ and COMFORT modes, and – if the optional Dynamic Damper Control or Adaptive Drive are selected – COMFORT+. As well as the accelerator progression, engine responses, power steering characteristics, intervention thresholds of the DSC stability control system and shift dynamics of the automatic transmission, this also allows the driver to adjust the damper settings and anti-roll control. Whichever mode he chooses, the driver is activating a pre-configured and coherent overall set-up which includes reproduction of the engine sound. Here, a sound module is used to enhance the engine’s natural acoustic components to suit the driving situation and the Driving Experience Control mode selected, and this soundtrack is then transferred into the interior. The system’s digital signal processing technology exchanges data directly with the engine management and adjusts its output to the engine’s revs, the amount of torque being produced and the car’s speed over the road. This gives the driver an impressively accurate impression of how hard the engine is currently working and of the power being unleashed, and provides an even clearer window into the car’s responses on the road.


Intelligent all-wheel drive raises driving pleasure another notch.

The introduction of the BMW xDrive all-wheel-drive system into the
BMW 6 Series range adds another alluring dimension to the driving experience on board a top-class premium coupe.
The BMW 640d xDrive Coupe showcases the latest incarnation of the intelligent all-wheel-drive system. In addition to the variable transfer of power to the front and rear wheels, this technology also includes Performance Control, which divides drive between the right and left-hand rear wheels to suit the situation at hand.

In contrast to conventional all-wheel-drive systems, the electronically controlled BMW xDrive is set up not only to optimise traction on low-grip surfaces, but also to enhance dynamic performance through corners. The link-up of the all-wheel-drive system with the DSC (Dynamic Stability Control) function within the
ICM (Integrated Chassis Management) system enables all situations on the road to be identified and evaluated to allow the necessary control interventions to be made at an early stage. These can be carried out by xDrive either on its own or in combination with Dynamic Stability Control or Performance Control. The power is distributed quickly and with great precision to where it is needed, ensuring that the driver enjoys the handling characteristics expected of a BMW – even under extremely dynamic cornering.

The xDrive system has been specially tuned for service in the BMW 6 Series, taking into account the car’s specific properties and characteristics. This bespoke set-up is underpinned by the principle of blending the traditional rear-wheel-drive qualities of BMW cars harmoniously with the benefits of distributing power between all four wheels. As with every all-wheel-drive BMW, 60 per cent of the engine’s power is sent to the rear axle in normal conditions and 40 per cent to the front wheels. This torque split can be adjusted in an instant to suit changing conditions.


Linking up to allow proactive analysis and precise interventions.

Identifying the risk of traction loss at a very early stage allows wheel spin to be prevented at one or more wheels by varying power distribution. xDrive can therefore be described as an “intelligent” all-wheel-drive system.
This proactive analysis of the driving situation takes into account the data from the engine management system and information on accelerator position, steering angle, wheel speeds and lateral acceleration stored in the ICM system. Based on this extensive information, xDrive is able to finely control the distribution of power between the front and rear wheels to ensure that engine output is fully utilised at all times. This allows xDrive to nip oversteer or understeer in the bud – unlike conventional all-wheel-drive systems, which only react when at least one wheel is already spinning. If the car is threatening to understeer, a greater proportion of drive power is immediately sent to the rear wheels.This makes for sharper turn-in on the entry to a corner; in other words, xDrive improves stability before the driver is even aware of the need. Similarly, the system’s proactive capabilities allow it to correct oversteer tendencies at the earliest possible stage by directing surplus power to the front wheels. That means the benefits of all-wheel drive can be enlisted even before traction loss actually occurs.

Intelligently varied power distribution also has benefits for ride comfort; due to the stabilising effect of xDrive, DSC now only needs to intervene in extreme situations. Only when optimal drive power distribution alone is insufficient to keep the vehicle on track does DSC intervene by reducing engine power and selectively braking individual wheels.


Electronic control enables extremely rapid reactions.

The xDrive system’s electronic control system allows the power split between the front and rear wheels to be altered almost instantly to suit changing driving conditions. It does this by adjusting the multi-plate clutch in the central transfer case, using a stepper motor. The higher the pressure on the clutch plates, the more power is transferred to the front wheels via a gear system. Conversely, when the clutch is completely open, all power goes to the rear wheels. The electronic control system is capable of varying the torque distribution in record-quick time: it takes just 100 milliseconds to fully open or fully close the clutch.

Performance Control improves these driving dynamics even further. Working with the xDrive control function, this electronic system uses precisely controlled braking and variable torque distribution to counteract the onset of understeer on low-traction surfaces and under particularly dynamic cornering, thereby improving agility. As soon as understeer is detected, the integrated electronic control functions of xDrive and DSC selectively brake the rear wheel on the inside of the corner. The resultant loss of propulsion is compensated for by an increase in drive power.


BMW xDrive now also destined for success in the BMW 6 Series.

BMW has offered its customers all-wheel-drive vehicles for more than
25 years. From the outset, BMW used the transfer of power to both axles not only to optimise traction on loose surfaces and in adverse weather conditions, but also to enhance dynamic performance through corners. Over the years,
all-wheel drive has developed from an option initially limited to selected models to a growth driver for the ongoing expansion of the model range.

The worldwide success of xDrive has also been aided by the introduction of the BMW X models. With the BMW X5, BMW X6, BMW X3 and BMW X1, the range now includes four models which set the benchmark in their segments in terms of agility and driving pleasure. In these models, as elsewhere in the BMW range, the all-wheel-drive system not only gives drivers a traction and stability advantage, but also plays a key role in delivering stand-out dynamic performance. Alongside the triumphant progress of the BMW X models, the number of all-wheel-drive variants in other model series has also grown consistently. Today, xDrive models can be found in the BMW 3 Series, BMW 5 Series, BMW 7 Series and now, for the first time, the BMW 6 Series range.

The new BMW 640d xDrive Coupe injects an extra dose of variety into the
BMW 6 Series, and the intelligent all-wheel-drive system is also fitted in the
BMW 650i xDrive Coupe. In this model, xDrive divides the power generated by a V8 engine with BMW TwinPower Turbo technology between the front and rear wheels. The power unit underneath the bonnet of the BMW 650i xDrive Coupe develops maximum output of 300 kW/407 hp and peak torque of 600 Newton metres (443 lb-ft), and again links up with the eight-speed Sports automatic gearbox. With the added benefits of xDrive on board, the car can sprint from 0 to 100 km/h (62 mph) in 4.8 seconds.


BMW 6 Series Coupe offers greater variety.

With three engine variants (bearing the BMW 640i, BMW 650i and
BMW 640d badges), a choice between BMW’s traditional rear-wheel drive and intelligent all-wheel-drive technology, state-of-the-art chassis technology and an array of innovative and – in some cases – unique equipment features, BMW brings an exclusive product package to the premium luxury-class coupe table.

The new BMW 6 Series Coupe can also be equipped with a specially developed M Sport package. The aerodynamic, exterior and interior components designed in familiar M style clearly showcase the sports car character of the 6 Series Coupe. Equipment includes an M aerodynamics package with bespoke body components for the front end, side sills and rear apron, exhaust tailpipe embellishers in Chrome Dark, LED front fog lamps and 19-inch light-alloy wheels in M double-spoke design. 20-inch light-alloy wheels in M double-spoke design can also be ordered as an option. Inside, features such as M-specific Alcantara/leather sports seats in Anthracite with Blue contrast stitching, an M leather steering wheel with multifunction buttons and gearshift paddles, and Aluminium Hexagon interior trim strips all play their part in creating a full-blooded driving experience. The M Sport package also includes door sills bearing the M logo, as well as an M driver’s footrest.

The BMW 6 Series Coupe offers seating for four immersed in a luxurious ambience, while its 460-litre boot can accommodate three 46-inch golfbags or two medium-sized hard-shell suitcases plus a flight case. The comfort-enhancing equipment fitted as standard in the new BMW 6 Series Coupe includes 2-zone automatic climate control, a multifunction steering wheel, electric steering column adjustment, electrically adjustable and heated exterior mirrors, Cruise Control with braking function, a rain sensor with automatic headlight range control, a HiFi audio system and the control system iDrive with a freestanding Control Display in flatscreen design. Among the highlights on the options list are Adaptive LED Headlights and the Bang & Olufsen High End Surround Sound System.

A rich variety of driver assistance systems and mobility services from
BMW ConnectedDrive also help to give the new BMW 6 Series Coupe its innovative character. Enhancing convenience during a journey, for example, are services such as a personal assistant who is at your service around the clock and searches for addresses, inputting them as destinations directly into the navigation system. The Real-Time Traffic Information function, meanwhile, transfers extraordinarily precise data and diversion recommendations to the navigation system.
Other supportive functions include Active Cruise Control with Stop & Go function, Speed Limit Info, a rear-view camera, Surround View and BMW Parking Assistant. The scope of in-car infotainment, meanwhile, enters a new dimension: the Apps option and BMW Connected application allows Apple iPhone owners to use Facebook, Twitter and the web radio function inside their
BMW 6 Series Coupe. And the office functions enable calendar entries, for example, or e-mails on a smartphone to be shown in the vehicle display and read out to the driver. ConnectedDrive features also help to improve safety. The new-generation BMW Head-Up Display offers optimised display quality, with a full spectrum of colours now available for the graphics, allowing extremely realistic-looking symbols to be projected onto the windscreen. Other functions include Advanced Emergency Call with automatic position finding and accident severity detection, BMW Night Vision with pedestrian recognition, the Lane Change Warning System and the Lane Departure Warning System.

Munich. Simultaneously with the world premiere of the first BMW M Performance automobiles, BMW’s concept study of a further model from this new product category will be showcased on the media days (6 – 7 March 2012) at this year’s Geneva International Motor Show. The BMW Concept M135i consistently utilises the dynamic potential of the new BMW 1 Series for the concept of the first BMW M Performance automobile featuring a straight six-cylinder petrol engine. The body design of the BMW Concept M135i assigns the youthful and sporty looks of the new BMW 1 Series to a three-door compact model, complementing it with the distinctive athleticism so typical of a BMW M Performance automobile.


Concept study with characteristics typical of a BMW M Performance automobile.

With its sporty appearance, the compact three-door car authentically conveys the typical qualities of BMW Performance automobiles to yet another vehicle segment. BMW M Performance automobiles offer an ideal symbiosis of outstanding performance and everyday suitability. Using the expertise gained by the BMW M division from decades of motor racing experience, the supreme performance of its tremendously powerful engines specifically designed to suit each model, the meticulously modified suspension technology and the aerodynamic characteristics are all combined into a harmonious overall concept. As a result, BMW M Performance automobiles have noticeably increased agility, precisely controllable handling characteristics and an emotional design. One look at the BMW Concept M135i and the qualities crucial to that characteristic M Performance feeling are instantly evident.

The employment of a straight six-cylinder petrol power plant featuring M Performance Twin Power Turbo technology with a power output of more than 300 hp creates the ideal prerequisites for maximum dynamics in the premium compact segment and, in conjunction with rear-wheel drive concept still unique in this vehicle class, ensures unsurpassed driving pleasure so typical of a BMW.

Moreover, the characteristic handling precision of BMW M Performance automobiles is obtained through model-specific suspension technology that includes an M sports braking system and is perfectly adapted to match the supreme road performance. 18-inch M light alloys with a double spoke design additionally complement the concept car’s sporting character.


Body features typical M athletic design.

The front apron of the concept car boasts a typical M design, signalising intensive road-orientation, its large air intakes designed to match the cooling requirement of the powerful engine, ancillary components and large brakes. The three-dimensionally designed flaps on the air intakes give indication of the car’s direct association with motor racing.

In addition to intense road-orientation, the specific design of the rear end of the BMW Concept M135i emphasises above all the vehicle’s width. This is supplemented in particular by the three-dimensional modelling of the surfaces and the lower section of the rear apron finished in Dark Shadow metallic. Furthermore, the rear apron accommodates the exhaust system’s double tailpipe that features a dark chrome trim.

The BMW Concept M135i’s exterior mirror caps in Ferric Grey and side window surrounds in BMW Individual High Gloss Shadow Line are a further feature of BMW M Performance automobiles.


Dynamic, stretched appearance. Concept study of the three-door BMW 1 Series.

Compared with the silhouette of the five-door BMW 1 Series, the three-door BMW Concept M135i makes an even more sporting and elegant statement. On the whole, the car has a more dynamic and elongated appearance. Viewed from the side, the car’s athletic, low-slung appearance and its nearness to the road are even more intensely expressed by an entirely horizontal contour line in the area of the doorsills. A dynamically rising character line symbolises the BMW Concept M135i’s urge to move forwards.

The wide doors are a further characteristic feature of the BMW Concept M135i’s body design. Together with the rear side windows, the frameless windows form a coherent window surface reaching back to the rear end, accentuating the body’s dynamically stretched appearance.

In addition, the surface design in the area of the rear side panels helps above all to emphasise the powerfully flared wheel arches. The visual accentuation of this part of the body directs the eye to the rear wheels, where the power of the six-cylinder power plant is transformed into driving dynamics in typical BMW manner.


Attractive prospects for the further development of the BMW 1 Series model range.

Thanks to a distinctively sports-oriented appearance, the BMW Concept M135i offers attractive prospects for the further development of the BMW 1 Series model range. At the same time, a clear signal has been given for the expansion of the new product category of BMW M Performance automobiles. The BMW M Performance automobiles being presented at the Geneva Motor Show and shortly to be launched are powered by the world’s most high-performing six-cylinder diesel engine available for series production vehicles. The petrol-fuelled models in this product category will also assume a similar unique position. The pre-series concept car BMW Concept M135i offers a fascinating outlook on a corresponding offer in the premium compact segment.

• New edition of the BMW M6 in Coupe and Convertible body variants; generous dose of M feeling combined with alluring design aesthetics, a luxurious aura, seating for four and innovative equipment features; high-performance sports car with superior performance attributes and extremely exclusive character; BMW M6 Coupe and BMW M6 Convertible both occupy a unique position in the premium segment of the executive class thanks to their blend of outstanding dynamics, hallmark M conceptual harmony and everyday usability; further development of both concepts breaks new ground with significantly improved efficiency, optimised controls for individualising the car set-up and a wider variety of driver assistance systems and infotainment functions available from BMW ConnectedDrive.

• Visually imposing body design with dynamically elegant lines and hallmark M athleticism provides an accurate visual showcase for the car’s high-performance properties; BMW M6 Coupe with strikingly contoured roof made from carbon fibre-reinforced plastic (CFRP); BMW M6 Convertible with high-quality soft-top boasting distinctive “fin” architecture.

• High-revving 4.4-litre V8 engine with M TwinPower Turbo technology, consisting of Twin Scroll Twin Turbo technology, cross-bank exhaust manifold, High Precision Direct Petrol Injection and VALVETRONIC fully variable valve control; hallmark M power delivery headlined by instantaneous responsiveness and a sustained wave of thrust; highest output in the segment; 412 kW/560 hp at 6,000 – 7,000 rpm, maximum torque: 680 Newton metres (502 lb-ft) from 1,500 rpm; maximum engine speed: 7,200 rpm; engine output 10 per cent higher than predecessor models, maximum torque 30 per cent higher.

• Acceleration: 0–100 km/h (62 mph) in 4.2 seconds (BMW M6 Coupe) or 4.3 seconds (BMW M6 Convertible); 0–200 km/h (124 mph) in 12.6 (13.1) seconds; electronically governed top speed: 250 km/h (155 mph) or 305 km/h (189 mph) with M Driver’s Package.

• Extraordinarily fine balance between performance and fuel consumption represents major improvement on previous models; average fuel consumption in the EU test cycle: 9.9 litres per 100 km / 28.5 mpg imp (BMW M6 Coupe) and 10.3 litres per 100 km / 27.4 mpg imp (BMW M6 Convertible); Auto Start-Stop function and further Efficient Dynamics technology as standard; fuel consumption of the respective predecessor models cut by more than 30 per cent.

• Seven-speed M Double Clutch Transmission with Drivelogic; automatic gear selection tuned to deliver optimum traction, Launch Control and Low Speed Assistance; bespoke M gear selector; newly developed M leather steering wheel with gearshift paddles.

• Power sent to the rear wheels; Active M Differential ensures fully variable distribution of drive between the rear wheels. Result is optimised traction and directional stability during dynamic lane changes and when accelerating out of corners.

• High-performance characteristics with outstanding dynamics and precisely controllable handling, thanks to hallmark M harmony in the interplay of powertrain and chassis technology, aerodynamics and weight balance; weight-to-power ratio – BMW M6 Coupe: 3.3 kg/hp (7.3 lb/hp),
BMW M6 Convertible: 3.5 kg/hp (7.7 lb/hp).

• M-specific chassis with bespoke front and rear axle kinematics;
M-specific Dynamic Damper Control as standard; DSC stability control incl. M Dynamic Mode; M Servotronic steering; body strengthening using special panels; lightweight compound high-performance braking system; available as an option are newly developed, globally unique M carbon-ceramic brakes with optimum resistance to fade and wear, and lower weight.

• Engine responses, M Servotronic mapping, Drivelogic shift program,
DSC mode, damper characteristics and information shown on the Head-Up Display can be programmed individually; two M Drive buttons on the steering wheel can be used to store and call up individually configured
car set-up options.

• Body design with classical BMW Coupe/Convertible proportions, customary sporty yet elegant BMW 6 Series looks and typical M sporting edge; special M design features provide an accurate visual representation of the car’s technical profile and performance; three-section, strikingly modelled lower air intake with aerodynamically optimised flaps; new M kidney grille with black double slats; flared wheel arches; hallmark M gills with integrated direction indicator bars; aerodynamically optimised exterior mirrors and side skirts; BMW Individual High-gloss Shadow Line; exposed reflectors below the rear lights; aerodynamically optimised rear apron with diffuser between the right and left-hand pair of twin exhaust tailpipes; 19-inch (standard) or 20-inch (optional) forged M light-alloy wheels, each with a distinctive interpretation of the familiar M double-spoke design.

• Luxurious, elegantly sweeping interior design with special M controls and styling features; newly developed M double-spoke leather steering wheel; M gear selector and car set-up controls on the model-specific centre console; exclusive M sports seats with integrated belt system (optional: M multifunction seats); Merino leather upholstery with extended features; exclusive carbon-fibre interior trim strips; illuminated door sill finishers with model lettering; M-specific instrument cluster with black-panel technology; 2-zone automatic climate control with extended features, ambient lighting.

• Adaptive LED Headlights fitted as standard, extensive range of BMW ConnectedDrive features, some unmatched by any rival: BMW Head-Up Display with M-specific information, High Beam Assistant, BMW Night Vision with pedestrian recognition, Lane Change Warning, Lane Departure Warning, rear-view camera, Surround View, Speed Limit Info, internet access, extended integration of smartphones and music players, Real-Time Traffic Information and apps for receiving web radio and using Facebook and Twitter.

• Almost all BMW 6 Series equipment options available, including Comfort Access, active seats, heated steering wheel, doors with Soft Close Automatic function, Navigation system Professional, Bang & Olufsen High- End Surround Sound System.


Performance, fuel consumption and emissions data:

BMW M6 Coupe:
Acceleration [0 – 100 km/h (62 mph)]: 4.2 seconds,
acceleration [0 – 200 km/h (124 mph)]: 12.6 seconds,
top speed: 250 km/h (155 mph), 305 km/h (189 mph) with
M Driver’s Package,
average fuel consumption: 9.9 litres/100 kilometres (28.5 mpg imp),
CO2 emissions: 232 g/km, exhaust standard: EU5.
BMW M6 Convertible:
Acceleration [0 – 100 km/h (62 mph)]: 4.3 seconds,
acceleration [0 – 200 km/h (mph)]: 13.1 seconds,
top speed: 250 km/h (155 mph), 305 km/h (189 mph) with M Driver’s Package),
average fuel consumption: 10.3 litres/100 kilometres (27.4 mpg imp),
CO2 emissions: 239 g/km, exhaust standard: EU5.

The global success of the BMW X model concept is rooted in a level of sporting flair unmatched by any other all-wheel-drive car with off-road capability. The powerful engines, advanced chassis technology and BMW xDrive all-wheel-drive system (whose primary talent, in addition to maximising directional stability and traction on loose ground and in adverse weather conditions, lies in enhancing dynamic performance through corners) of the BMW X5 and BMW X6 provide driving pleasure beyond the reach of their segment rivals. Plus, the six-cylinder in-line diesel versions of the Sports Activity Vehicle and Sports Activity Coupe, in particular, impress with surprisingly low fuel consumption and emissions given their construction and performance capability.

The launch of the BMW M Performance Automobiles adds another layer to the BMW X models' reputation for presence, poise and efficiency. With the most powerful diesel in the BMW engine line-up and the optimisation of power transfer, handling and aerodynamic balance for which M is renowned, the BMW X5 M50d and BMW X6 M50d set new standards in their class in terms of sporting performance, conceptual harmony and efficiency.

M Performance TwinPower Turbo technology: an efficient route to enhanced sporting performance.

Increased diesel power and an M-specific set-up make the BMW X5 M50d and BMW X6 M50d even more assured performers. The engine developed for the BMW M Performance Automobiles generates maximum output of 280 kW/381 hp and peak torque of 740 Newton metres (546 lb-ft), making the two BMW X models the envy of every other diesel-engined model in this segment. The BMW X5 M50d races from 0 to 100 km/h (62 mph) in 5.4 seconds, while the BMW X6 M50d brings that time down to 5.3 seconds. Both models also benefit from the immense reserves of power provided by their diesel engine when it comes to short sprints at higher speeds. Top speed is electronically limited to 250 km/h (155 mph) in both cases.

The two models' frugal approach to fuel use offers further evidence of their impressive abilities. At 7.5 litres per 100 kilometres (37.7 mpg imp) and 7.7 l/100 km (36.7 mpg imp) respectively in the EU test cycle, the average fuel consumption figures of the BMW X5 M50d and BMW X6 M50d are only slightly above those for the existing diesel variants of the two models. CO2 emissions stand at 199 grams per kilometre for the BMW X5 M50d and 204 grams per kilometre for the BMW X6 M50d.

Outstanding efficiency is a characteristic the eight-speed Sports automatic transmission in the BMW X5 M50d and BMW X6 M50d shares with the new diesel engine. Added to which, BMW EfficientDynamics technology guarantees intelligent energy management. Brake Energy Regeneration, the need-based operation of ancillary components and a disengageable air conditioning compressor are all standard.

BMW xDrive: intelligent control, optimised to enhance dynamics.

The BMW xDrive all-wheel-drive system uses an electronically controlled multi-plate clutch to distribute the engine's power between the front and rear wheels variably and according to the situation at hand. Indeed, drive can be switched between wheels in a split-second to optimise traction, directional stability and driving dynamics. xDrive and the DSC stability control system work together to provide advance analysis of the driving situation ahead. The ability to detect the danger of drive slip at an early stage and counteract one or several spinning wheels by varying the distribution of power has helped earn xDrive its status as an intelligent all-wheel-drive system.

In normal driving situations drive is sent predominantly to the rear wheels, accentuating the renowned handling characteristics of BMW cars. The M-specific set-up of the BMW X5 M50d and BMW X6 M50d has been optimised to enhance dynamics, helping it to retain a rear-wheel bias under dynamic cornering. Even when the car is stable through corners, a larger proportion of the engine's power is channelled to the rear axle to enhance agility and stave off understeer.

In addition, Performance Control enhances the handling agility of the BMW X5 M50d, while Dynamic Performance Control does a similar job for the BMW X6 M50d. As soon as the front wheels of the BMW X5 M50d start to push excessively to the outside of a corner, the control electronics of xDrive and DSC team up to brake the rear wheel on the inside of the bend as required. The loss of forward propulsion is balanced out by an increase in engine power, the intervention of Performance Control ensuring precise turn-in. Power distribution can be varied to an even greater degree in the BMW X6 M50d, which comes as standard with Dynamic Performance Control. This system reroutes engine output from the inside rear wheel to the outside rear wheel around a corner if the system detects an imminent risk of understeer. Dynamic Performance Control also counteracts oversteer in its early stages, switching drive from the outside rear wheel - which is experiencing particularly high centrifugal forces - to the inside rear wheel. Dynamic Performance Control also steps in to stabilise the car when the driver takes his foot off the accelerator, ensuring precise and agile turn-in and enabling extremely dynamic acceleration out of corners.

M-specification chassis set-up produces accurate steering and precisely controllable handling.

The chassis technology underpinning the BMW X5 M50d and BMW X6 M50d is based on a double-joint spring-strut front axle and integral rear axle. This arrangement offers the ideal platform for a sporty handling set-up which also achieves high standards of ride comfort. Both models also feature air suspension with automatic self-levelling at the rear axle. The support mounts, elastokinematics, spring and damper system, and Servotronic mapping of the hydraulic steering - among other things - have been modified to imbue the chassis set-up of the two BMW X models with hallmark M characteristics.

Stronger body mounting reduces roll, which in turn optimises steering accuracy through corners. At the same time, the linear build-up of lateral forces for which M cars are renowned enables precisely controllable handling up to the limit. The M-specification tuning of chassis components extends to the electronically controlled dampers and active anti-roll control function of Adaptive Drive, which comes as standard on the BMW X6 M50d and is available as an option for the BMW X5 M50d. Meanwhile, the large-format braking system - with 385-millimetre front discs and 345-millimetre rear discs - provides powerful and consistent braking, even under heavy loads.

Exclusive design features: aerodynamically optimised body, sporty interior ambience.

Exclusive exterior and interior design features for the two BMW M Performance Automobiles based on the BMW X models provide clear visual differentiation, optimised aerodynamic balance and enhanced driving pleasure. Its powerful presence and distinctively three-dimensional contours make the body-coloured front apron a genuinely eye-catching item. To optimise the supply of cooling air to the power unit, the spaces normally reserved for foglamps on regular BMW X models take on a new role as air intakes, and these large surfaces offer a tantalising hint of the engine power lurking behind the scenes. Horizontal bars in the colour shade Ferric Grey metallic course across their surface. The race-inspired air-channelling flaps sited below the side air intakes optimise the cars' aerodynamic balance at high speeds.

Titanium-coloured vertical bars for the BMW kidney grille, exterior mirror caps in Ferric Grey metallic, a model badge on the tailgate and BMW High-gloss Shadow Line trim for the side window surrounds and exterior mirror bases add further model-specific touches. The BMW X5 M50d comes as standard with 19-inch M light-alloy wheels in V-spoke design, the BMW X6 M50d with 20-inch M light-alloy wheels in double-spoke design. Both models are also available with optional 20-inch M light-alloy wheels in Ferric Grey metallic developed exclusively for the BMW M Performance Automobiles and fitted with mixed tyres. The powerful appearance of the BMW X5 M50d is given additional presence by wheel arch extensions and bespoke side sills and kick plates, while the athletic stance of the BMW X6 M50d is underlined by a bonnet sporting a striking powerdome as standard. Both models also boast a muscular rear apron with the embellishers for the exhaust tailpipes integrated left and right.

The sporting driving pleasure served up by the BMW X5 M50d and BMW X6 M50d is summed up in their interiors by door sills bearing the "M Performance" lettering, the inscription "M50d" in the instrument cluster, a gearshift lever with M logo, an M leather steering wheel with gearshift paddles, an M driver's footrest, a BMW Individual roof liner in Anthracite and Brushed Aluminium Shadow interior trim strips. Both models are also fitted as standard with exclusive Alcantara/Nappa leather M sports seats offering electric adjustability and a memory function. The black seats are adorned with white contrast stitching and an embossed M logo.

Among the other items of standard equipment fitted on the BMW X5 M50d and BMW X6 M50d are xenon headlights with LED daytime driving lights, Cruise Control with braking function, 2-zone climate control, a rain sensor, the Radio Professional and the iDrive control system. Highlights of the options list include Comfort Access, automatic tailgate operation (standard on the BMW X6 M50d), a glass/panoramic sunroof, doors with Soft Close Automatic function, a trailer coupling, a heated steering wheel, active seats, navigation systems with hard disk storage and high-quality audio and rear-seat entertainment systems. Customers can also order the BMW X5 M50d with a third row of seats, while the BMW X6 M50d is available with optional Adaptive LED Headlights.

The range of driver assistance systems and mobility services from BMW ConnectedDrive offers a wide selection of options designed to optimise convenience, safety and the use of infotainment functions. The BMW X5 M50d and BMW X6 M50d can be specified with equipment including Park Distance Control, a rear-view camera with Top View, Adaptive Headlights, the Head-Up Display, High-Beam Assistant, Active Cruise Control with Stop & Go function, and Speed Limit Info. Other innovative technologies enabling the link-up of the car with the outside world and the integration of mobile devices give drivers access to the BMW Assist service (including Advanced Emergency Call with automatic position finding and BMW Online), as well as unrestricted in-car internet usage. Real-Time Traffic Information, meanwhile, gives the driver extremely extensive and precise traffic information. Among the benefits of the likewise optional Apps function is access to online services Facebook and Twitter.

The powertrain: The most innovative and sporty diesel engine in the world.

Impressive statistics headline the enviable regard in which modern diesel engines are held. The output now within their compass, but more significantly the maximum torque they are capable of generating have fuelled their popularity among even performance-minded drivers. The high efficiency of diesel technology also ensures extremely low fuel consumption and CO2 emissions. BMW has played a major role in the burgeoning appeal of the diesel engine, developing units which have time and again raised the bar in terms of sports performance and efficiency. The company's record of diesel engine development, which began in 1983 with the launch of its first diesel model, now continues into another fascinating dimension. The first of the new BMW M Performance Automobiles - founding a product category focusing on sporty driving pleasure - are powered by a diesel engine. The 3.0-litre six-cylinder in-line unit, whose cover bears the M Performance badge, has all the necessary tools to fulfil the brief handed to the new breed: technology without parallel worldwide, the highest output ever achieved by a BMW diesel engine and outstanding levels of efficiency.

Fitted in the BMW M550d xDrive, BMW M550d xDrive Touring, BMW X5 M50d and BMW X6 M50d, the 2,993 cc engine generates maximum output of 280 kW/381 hp. No less imposing is its peak torque of 740 Newton metres (546 lb-ft), all of which the driver will find on tap as low down as 2,000 rpm. Instantaneous torque development maintained into the upper reaches of the rev range is the hallmark feature of the new unit, one underpinned by an array of innovative and globally unique technical wizardry. Taking centre stage - for the first time in a BMW - are a trio of turbochargers. Their arrangement and interplay strategy are the key to the engine achieving its exceptionally high efficiency.

More pressure, more output, more torque: world premiere for six-cylinder in-line diesel engine with three turbochargers.

The coordinated interplay of turbochargers of different sizes endows an engine with instantaneous responsiveness at low revs and allows charge pressure to be increased according to need when the engine is placed under greater loads. BMW uses this concept in the six-cylinder in-line diesel engines with BMW TwinPower Turbo technology fitted in models including the BMW 535d, BMW X5 xDrive40d and BMW X6 xDrive40d. And now the company is set to become the world's first carmaker to present a diesel engine which expands the principle of multi-stage turbocharging to incorporate a third turbocharger. The engine developed for the BMW M Performance Automobiles will, for the first time, see two comparatively small high-pressure chargers working with a larger low-pressure unit. The integration of an additional high-pressure turbo increases the engine's capability when it comes to generating charge pressure, a key ingredient in taking the engine's power output to the next level.

The M Performance TwinPower Turbo technology - including the requisite charge air cooling - is, like its predecessor, integrated into a small space in the main unit. Its compact construction puts the engine in a position to meet future pedestrian protection stipulations, while the arrangement of the three turbochargers is also part of an extremely intelligent system. Both the exhaust inflow to drive the turbos and the supply of fresh air, plus the channelling of compressed air to the combustion chambers, have been designed to ensure that the three compression units work as a team as effectively as possible at all engine speeds. Efficiency is further optimised by the variable turbine geometry of the two high-pressure chargers, which allows them to react even more precisely to the driver's power needs.

Instantaneous responsiveness and precisely coordinated interplay.

One of the two small turbos is activated at engine speeds just above idle. Its low moment of inertia allows it to respond without delay to the slightest movements of the accelerator and therefore supply the combustion chambers with compressed air at an early stage. As revs increase, the flow of exhaust gas also reaches the larger turbocharger, which announces its arrival with the engine spinning at just 1,500 rpm. Working together with the small charger, it ensures that the impressive peak torque of 740 Newton metres (546 lb-ft) is generated at this low engine speed and maintained up to 3,000 rpm.

To further increase the performance of the large turbocharger, a greater volume of exhaust gas is required at around 2,700 rpm. If the driver calls up additional power, a vacuum-modulated exhaust flap instantly opens up another supply route, allowing extra exhaust gas to flow past the already active high-pressure charger to the large low-pressure turbo. The third turbocharger - integrated into this bypass line - also has a low moment of inertia and variable compressor geometry, which allow it to spring into action as soon as the exhaust flap opens. The result is additional charge pressure, generated by two sources at the same time. The large turbocharger is able to deliver its full output, while the second small turbo builds on the effect of its two active colleagues by supplying even more compressed air to the combustion chambers. This arrangement allows the turbocharging system to drive the engine with forceful and sustained thrust to its maximum output of 280 kW/381 hp, which it notches up between 4,000 and 4,400 rpm. The maximum engine speed of the new diesel powerplant is 5,400 rpm.

In order to ensure that charge pressure is developed as effectively as possible, not to mention efficiently, both the exhaust flow and supply of fresh air to the turbos and the channelling of compressed air into the combustion chambers is regulated with maximum precision. If the large turbocharger is spinning at particularly high speeds, a vacuum regulator opens a wastegate valve to relieve the pressure and so avoid unwanted exhaust backpressure. The supply of fresh air is also controlled according to need by means of pneumatically activated flaps. For example, at low revs a bypass flap ensures that the air is channelled directly to the high-pressure charger, which spins into action very early. At less than 2,700 rpm a change-over flap keeps the air away from the third turbo, which is not yet active, to prevent unnecessary fluctuations in pressure.

Indirect charge air cooling enables the temperature of the air compressed by the three turbos to be reduced to the optimum level for increasing engine output. Both the main radiator positioned immediately in front of the combustion chambers and the intercooler behind the low-pressure charger are supplied by a low-temperature water circuit with separate electric pump.

Detailed optimisation enables higher combustion pressure, increased output and enhanced efficiency.

The new torquey and high-revving diesel engine also breaks new ground with its specific output of 93.6 kW per litre of displacement. However, the output possible using M Performance TwinPower Turbo technology is generated not in the turbochargers but in the core of the basic engine, which has therefore also been extensively modified. Maximum combustion pressure has risen from the 185 bar of the most powerful diesel engine in the existing BMW line-up to 200 bar.

As part of this development, the crankcase in the new 3.0-litre diesel engine features an innovative tie rod concept for the assembly of the main bearing caps and cylinder head. The sintered main bearing caps are given extra strength by a central screw. Like the crankcase, the cylinder head is also subjected to a special high-pressure compression process. This "HIPen" manufacturing concept sees the aluminium castings heated to solution annealing temperature and the casting pores created during manufacturing welded under high pressure. This process gives the finished component additional strength. A double diagonal bore ensures the interbore bridges have high thermal stability.

The geometry of the crankshaft and connecting rods has been further optimised and they are now made from higher-strength materials. Added to which, hub bushings and bowl rim remelting enhance the effect of the increase in piston compression height.

Higher pressure also raises the efficiency of the injection system.

The injection system of the new six-cylinder in-line diesel engine has also benefited from a rigorous process of further development. The common-rail direct injection system plays its part in enhancing the engine's efficiency and promoting clean combustion by sending extremely precise quantities of fuel into the cylinders. The upgraded system raises the injection pressure of the piezo injectors to 2,200 bar. During each power stroke, three pre-injections, one main injection and four post-injections of fuel take place. An ultra-high-performance pump channels the fuel to the combustion chambers through a common rail made from forged stainless steel.

The output and capacity of the cooling system have been given another boost, too. An additional low-temperature circuit supplied by an electric water pump controls the temperature of the intercoolers. The exhaust treatment system includes a diesel particulate filter and oxidation catalytic converter, which is located close to the engine in the same casing. More efficient exhaust cooling, meanwhile, minimises the formation of nitrogen oxides. And standard-fitted BMW BluePerformance technology, which includes a NOX storage catalytic converter, helps the new diesel engine powering the BMW M550d xDrive to meet the EU6 exhaust standard not due to come into force until 2014.

Eight-speed Sports automatic transmission with M-specific gearshift dynamics.

The combination of the most powerful diesel engine ever offered for a BMW with an eight-speed Sports automatic transmission ensures that drive is transferred onto the road surface extremely effectively and efficiently. The configuration of the transmission management system for the BMW M Performance Automobiles promotes dynamic acceleration. The M-specification gearshift dynamics enable extremely rapid gear changes with an almost uninterrupted flow of power. The eight-speed Sports automatic transmission offers the driver two automated shift programs - D and S modes - as well as the option of changing gear manually (in M mode).

The automatic gearbox is operated using an electronic gearshift lever on the centre console adorned with an M logo. Manual mode allows the driver to change gears sequentially using either the gearshift lever or the paddles on the steering wheel. In customary M fashion, the right-hand paddle changes up a gear and the left-hand paddle is used for downshifts. If the driver activates manual mode using the gearshift lever, the transmission holds the gear selected until the engine's revs hit the limiter. By not shifting up automatically in this mode, the gearbox gives the driver maximum control over the car when pushing the dynamic boundaries. The driver can also switch instantaneously from automatic gear changes to M mode with a nudge of one of the gearshift paddles; if M mode is selected in this way, the gearbox's automatic shift-up function remains active. The transmission also restores automatic mode if the gearshift paddles are not used again following an upshift or downshift.

Enhancing the natural soundtrack inside the car turns driving pleasure up yet another notch.

The performance capability of the diesel engine and the hallmark M driving characteristics of the BMW M Performance Automobiles underpin a new definition of driving pleasure. Imposing torque and a set-up focused squarely on sports performance give drivers a dynamic driving experience they will never have previously sampled in a diesel car. The BMW M Performance Automobiles also lace this driving pleasure with additional acoustic appeal. Through sound design technology, the natural engine sound is specifically enhanced to suit the driving situation at the time and sent into the interior via the audio system, ensuring an authentic reproduction of the new engine's unmistakable straight-six soundtrack.

The system's digital signal processing technology exchanges data directly with the engine management, allowing it to base its precise transmission of the engine's timbre on the revs at any one time, the amount of torque being produced and the car's speed over the road. Accentuating the straight-six diesel's turbine-like, sporty and sonorous tones adds to the emotional appeal of the driving experience, especially in the BMW M550d xDrive when SPORT or SPORT+ mode is activated using the Driving Experience Control switch. This gives the driver an impressively accurate impression of how hard the engine is currently working and of the power being unleashed, and provides an even clearer window into the car's responses on the road. Controlling the audio system in this way also ensures that the engine sound can be enjoyed to equal effect from every seat.

New six-cylinder engine with three turbochargers - a milestone in the glittering history of BMW diesel engines.

The engine developed for the BMW M Performance Automobiles represents a new high water mark in the illustrious history of diesel engines at BMW. The premium carmaker has offered customers diesel-powered models since 1983. The BMW 524td that kicked off this fine tradition quickly earned itself the status of the sportiest diesel model on the market. Its engine developed 85 kW/115 hp and delivered the best performance yet also the lowest fuel consumption of any car in its class. Since then, diesel BMWs have regularly emerged as the most efficient models in head-to-head tests. A host of prestigious awards - such as the Engine of the Year Award - and the impressive success of diesel-powered BMW models on the track headline the company's unrivalled expertise in the development of diesel technology.

And so it is entirely in keeping with the company's proud heritage that the first BMW M Performance Automobiles are now set to line up with a diesel engine under the bonnet. The unit developed to power them fulfils its sporting brief with leading performance in a range of disciplines and, in so doing, dismantles the historic contradiction between driving pleasure and economy even more effortlessly than ever.