The BMW X6 M is a mid-size luxury crossover released for sale in the second quarter of 2008 by German automaker BMW. The X6 was marketed as a Sports Activity Coupé (SAC) by BMW. It combines the attributes of an SUV (high ground clearance, all wheel drive and all-weather ability, large wheels and tires) with the stance of a coupé (bold styling, dramatic sloping roof). Compared to the standard X6, the X6 M has 550 horsepower while the X6 only has 450 horsepower. But the two are almost the same except for the engine power and performance.