BMW has revealed details of the new high-performance M5 model due to go on sale early in 2005.

The fourth generation of what BMW describes as the 'businessman's express' is equipped with a normally-aspirated 5.0-litre V10 engine developing 507bhp.

The engine is redlined at 8,250rpm and will accelerate from 0-62mph in 4.7 seconds on to a limited top speed of 155mph. BMW claims that without the limiter the M5 could achieve 205 mph.

Power is transmitted through the world's first production car seven-speed sequential gearbox, swapping cogs 20% faster than the previous generation SMG transmission.

The SMG is pre-programmed with 11 different change patterns, including a 'launch control' function for the fastest getaway from rest, while the dynamic stability control system has been developed specifically for the M5.

There is a standard head-up display with speed, navigation, control messages and cruise control settings in the driver's line of vision, while activating the steering wheel-mounted MDrive button changes the display to a rev counter including vehicle speed and next gear indicator.