You either love the X6 or you don’t, but no one can accuse it of being unoriginal! The less powerful model, the xDrive35i, features a 300-hp inline-6. Then there’s the xDrive50i with a 400-hp V8 and the X6 M with no less than 555 hp. At the other end of the spectrum from this ultra-powerful version is the X6 ActiveHybrid whose 480 horses are (somewhat) less thirsty than the others.