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  BMW X6 M      

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Country of origin:Germany
Introduced in:2015
Introduced at:2014 Los Angeles Auto Show
Internal name:F16
Predecessor:BMW X6 M
Source:Company press release
Last updated:October 30, 2014
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Click here to download printer friendly versionThe ultra-high performance with exceptional fuel efficiency that characterises every car from BMW's sporty M division is once more fused with all-roads, all-weathers capability with the introduction of the second-generation X5 M and X6 M. Compared to the 2009 models which they succeed, they bring improvements of up to 10 per cent in power, torque and performance while lowering fuel consumption and CO2 emissions by over 20 per cent.

Both models are powered by a new 4.4-litre M TwinPower Turbo V8 engine with two TwinScroll turbochargers. With outputs of 575 hp and 750 Nm, it is the most powerful engine ever developed by BMW for four-wheel-drive vehicles. It is linked to a newly developed eight-speed M Steptronic automatic transmission now featuring Drivelogic. The cars' outstanding driving dynamics benefit from specific tuning by BMW M, while their bespoke interior and exterior designs blend sportiness, luxury and functionality.

The bare figures for the new BMW 4.4-litre V8 engine in the X5 M and X6 M are impressive enough in themselves, but they tell only half the story. This new power unit develops its maximum 575 hp - four per cent more than the engine in the previous models - from 6,000 to 6,500 rpm, while peak torque of 750 Nm (a gain of 10 per cent) is available from 2,200 to 5,000 rpm. This combination of high-revving capability with linear, rapid response is thanks to the engine's innovative M TwinPower Turbo technologies, which include cross-bank exhaust manifolds, two TwinScroll turbochargers, direct fuel injection working at a pressure of up to 200 bar and VALVETRONIC variable valve control.

These technologies, in combination with the newly developed eight-speed M Steptronic transmission with Drivelogic, ensure performance more than meets the expectations of a car from BMW M while at the same time demonstrating exceptional fuel efficiency. The X5 M and X6 M accelerate from 0-62 mph in a supercar-equalling 4.2 seconds, but in normal road driving they are capable of 25.4 mpg, with CO2 emissions of 258 g/km - reductions of over 20 per cent compared to the previous models.

The cross-bank exhaust manifold sends two converged streams of exhaust gas to the TwinScroll turbochargers through four separate exhaust ducts. The engine features an extremely rigid closed-deck crankcase which permits the high fuel injection pressures necessary for it to achieve its impressive power output. A lightweight, torsionally stiff forged crankshaft with low rotating masses helps to sharpen the engine's responses.

Every model from BMW M has to be passed as 'fit for the Nordschleife'. The extreme lateral and longitudinal acceleration put upon cars when lapping the Nurburgring places high demands on an engine's oil supply, but sophisticated sump and suction snorkel geometry ensures that the X5 M and X6 M can generate up to 1.2 g without problems. Meanwhile, a combination of low- and high-temperature radiators ensures optimum cooling for the engine coolant, charge air and engine and transmission oil. Electronically controlled flaps within the exhaust system help to provide a riche sporty soundtrack.

The eight-speed M Steptronic transmission with Drivelogic delivers all the advantages in terms of responsiveness of the M Double Clutch gearbox in other BMW M models, with the smoothness of a torque converter automatic. It also allows for a wider spread of gear ratios to foster greater fuel efficiency, and for the first time in a torque converter automatic it permits 'creep on demand' through the Low Speed Assistant system. The Drivelogic function allows the driver to prioritise fuel economy, comfort or sports performance, while gear changing can be fully automatic or driver-controlled via paddles on the steering wheel. A Launch Control function is fitted to permit perfect standing starts.

The xDrive four-wheel-drive system is fully flexible in the way it distributes torque to each axle, to ensure maximum traction on all roads and in all weathers. Normally the bias is towards the rear to give the X5 M and X6 M maximum agility, but when the occasion demands, 100 per cent of engine torque can be sent to either axle.

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  Article Image gallery (27) Specifications User Comments (1)