Once in a while, a car comes along that's so far out there, it's almost as if the manufacturer is wilfully raising two fingers to the world. Nothing had prepared us for the X6. As far as anyone except BMW could see, there was little indication of any demand for a luxury 4x4 coupe and no rival brand had dared dream up anything similar. That didn't stop BMW from building it and well-heeled customers from buying it. The point of the car may be difficult to discern but there are times when you just have to stop rationalising and take a vehicle for what it is. A big, imposing, expensive but well engineered bit of fun.