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2010 BMW X6 M
The X6 M uses a version of BMW’s latest 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.