Offered as a coupe or a convertible (with fabric top), BMW's 6 Series imposes respect, as much for its generous dimensions as for its price tag of more than 100,000$. The interior is not the largest, but its luxury is impeccable. Engineers have fitted the regular version with a 360 horsepower 4.8-litre V8 engine, but it is possible to get a 500 horsepower V10 engine with the M6.