BMW has confirmed the new 640d xDrive Coupe and Convertible will be available in spring 2012.
The BMW 6 Series 640d features a 310bhp 3.0-litre six-cylinder diesel engine with an eight-speed automatic gearbox and four-wheel drive.
It can accelerate from 0-62mph in 5.2 seconds and has a limited top speed of 155mph.
The 640d Coupe comes as standard with several BMW Efficient Dynamics fuel-saving technologies, including brake energy regeneration and stop/start. As a result, it returns 49mpg and produces emissions of 150g/km.
Both models offer three driving modes allowing drivers to switch between Sport, Sport+ and Comfort. This adjusts the throttle, steering, stability control, suspension and gearshift settings. Each mode also adjusts the engine's sound.
Prices and full UK specifications will be announced nearer to launch.
