BMW’s fastest ever soft-top, the M6 Convertible, will make its debut at the British International Motor Show (July 18 – 30).

The M6 Convertible goes on sale in the UK in September 2006. It becomes the first ever BMW to make a British Motor Show debut and it is the first time a BMW M version of a 6-series convertible has been built.

The new open-top M6 uses BMW’s 5.0-litre V10 engine developing 507bhp. This powers the car from 0-62mph in 4.8 seconds before going on to an electronically limited top speed of 155mph.

The BMW M6 Convertible’s Drivelogic function offers the driver a choice of 11 different gear change options - five in auto mode and six in manual mode – each offering a different speed of gear shift.

The M6 Convertible manages 18.6mpg and produces carbon dioxide emissions of 366g/km.

Prices for the M6 Convertible and full specification details will be announced nearer the launch date.