Available with a choice of two engines, the 2012 6-Series Coupe and Convertible come in either 640i or 650i trim. The numbers denote the virtual engine sizes: the 640i uses a 3.0-liter TwinPower turbocharged six-cylinder engine rated at 315 horsepower; the 650i gets a 4.4-liter twin-turbocharged V-8 engine rated at 400 horsepower. Both engines comes standard with an eight-speed automatic transmission that shifts smoothly and seamlessly, and rises to the task of more aggressive driving surprisingly well. A six-speed manual transmission is available on rear-drive V-8 models.
Both engines are willing performers, but the larger, more laid-back character of the 6-Series is best suited by the V-8, in our estimation. Easy, smooth power complements the ride quality and handling, making it truly effortless to cruise along well above 100 mph--though you'll want to pay attention to that tendency if you're not a fan of large speeding tickets.
A Driving Dynamics Control system offers adjustability to the car's performance character, with driver-selectable Comfort, Sport, and Sport+ modes available at the press of a console-mounted button. Tweaking throttle response, transmission behavior, and suspension settings, the DDC is a handy tool to smooth out rough roads or firm up the ride for a more spirited bit of road.