BMW is set to add another variant of the Coupe and Convertible to the BMW 6 Series line-up with the arrival of the BMW 640d xDrive Coupe and Convertible in spring 2012. Intelligent all-wheel drive – making its debut in the BMW 6 Series – teams up with a six-cylinder in-line diesel engine featuring BMW TwinPower Turbo technology to take driving pleasure to another new level. The combination of a diesel engine and BMW xDrive all-wheel drive, which will also be found in the BMW 640d xDrive Convertible, gives the BMW 6 Series a spread of abilities none of its rivals can match.