The new BMW M6 made its debut at the 2005 Geneva Motor Show. It is based on the BMW E63/E64 6-Series, introduced in 2004. It shares the same 5.0 L V10 S85 engine and SMG III gearbox with the E60 M5, and produces 507 ps (373 kW) / 384 ft/lbf (521 N/m).
BMW claims it will accelerate from 0 to 100 km/h (62 mph) in 4.6 seconds and has an electronically limited top speed of 250 km/h (155 mph). With the limiter removed, the top speed can reach 330 km/h (206 mph). And multiple road tests have shown that the M6 accelerates from 0 to 60 in 4.1 seconds.
The M6 will have the same ‘power button’ as the M5 which modifies the throttle response. From ignition, the car delivers 400 hp (298 kW), but engaging the button allows the full 507 ps. It weighs 1710 kg (3770 lb) thanks to a carbon fibre reinforced plastic roof panel as well as thermoplastic front wings, aluminium doors and bonnet and compound boot lid. The carbon fibre and other light materials are used in places like the bumpers and roof that are far from the centre of gravity and/or high up, so that they not only reduce the overall weight but improve the handling by reducing, respectively, the moment of inertia and the centre of mass height.
Initially it will only be available as a coupe, although a cabriolet and a lightweight CSL version are expected in 2006 and 2007 respectively. The 2007 Cabriolet is expected to have a 0-60 time in about 4.6 seconds (Road and Track, September 2006). It can be visually distinguished from the 630i, 645Ci and 650i by its deeper front valance with air intakes, more contoured side sills and a rear valance with diffuser as well as four tail pipes.