The new BMW M6 concept 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 507PS / 500 bhp (370 kW) / 384 ft·lbf (521 Nm).
The M6 has the same 'power button' as the M5 which modifies the throttle response. From ignition, the car delivers 399 bhp (298 kW), but engaging the button allows the full 500 hp (370 kW) in the US (507 PS in Europe). It weighs 3,770 lb (1,710 kg) thanks to a carbon fibre reinforced plastic roof panel as well as thermoplastic front wings, aluminium doors and bonnet (hood) and compound boot (trunk) 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 center of mass height.
BMW claims it accelerates from 0 to 100 km/h (62 mph) in 4.3 seconds (0-60 mph: 4.1 s [Road & Track [2/06]) 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 (205 mph).
