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 373 kW (500 hp) / 520 N·m (380 lb·ft).
BMW claims it accelerates from 0–62 mph (0–100 km/h) in 4.4 seconds. Road & Track (Feb 2006) measured the 0–97 km/h (0–60 mph) time as 4.1 seconds. The top speed is 333 kilometres per hour (207 mph) but it is limited to 249 km/h (155 mph).