The X6 M is a high-performance variant of BMW's controversial head-turning crossover. Unveiled at the New York Auto Show in 2009, the X6 M uses a potent version of BMW's twin-turbocharged 4.4-liter V8. Output is pegged at 555 horsepower at 5,750 rpm and peak torque is 501 pound-feet, available between 1,500 and 5,650 rpm. The car can accelerate from zero to 60 mph in 4.7 seconds, according to the automaker.

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The hotrod SUV, which goes head-to-head with Porsche's Cayenne Turbo and Turbo S is priced from $88,900, making the M $9,000 cheaper than the Turbo -- which is likely the intended competitor -- and $35,000 less than the Turbo S, which has a similar horsepower rating.

The X6 M and X5 M are the first xDrive all-wheel-drive vehicles from BMW to sport the "M" badge. Coupled with special "M" air suspension featuring Adaptive Drive and the newly developed Servotronic power steering, the performance 'ute promises very competent handling. Other high-tech features include launch control for maximum acceleration and an "M" six-speed automatic optimized for performance. Drivers can manually select gears using either paddles or an an electronic gear selector lever.

Electronically controlled, variable power distribution to the front and rear axle prevents even the slightest tendency to over- or understeer right from the start, before DSC Dynamic Stability Control is even required to cut in.

BMW is referring to the new 4.4-liter motor as its "M TwinPower Turbo" unit. The name reflects the fact that the motor features Twin Scroll Twin Turbo Technology and a common exhaust manifold encompassing both rows of cylinders.

Although traction control is standard, the M Dynamic Mode (MDM) greatly reduces the aggressiveness of the system. The MDM setting allows the driver to enter a controlled drift and push the vehicle's handling to the limit. There's also a DSC-Off Mode for drivers seeking a more purist experience.