Further details of the new BMW M3 Coupé, the most powerful road-going M3 the marque has ever produced, have been announced.

The latest BMW M3 Coupé is a technical tour de force. The 420hp V8-engined performance car is capable of zero to 62mph in 4.8 seconds, before going on to an electronically-limited top speed of 155mph. But while engine capacity, cylinder count and output have increased compared to the previous M3’s six-cylinder unit, engineers have managed to reduce powerplant weight and introduce elements of BMW’s EfficientDynamics programme.

The use of lightweight engine components means the 3,999cc engine weighs 15kgs less than the previous 3.2-litre six-cylinder. Brake Energy Regeneration combines with an induction system featuring eight individual throttle butterflies and double-VANOS variable valve technology for the best performance. Such technology is why the BMW M3 posts a consumption figure of 22.8mpg on the combined cycle, an eight per cent improvement over the outgoing car.

The BMW M3 Coupé goes on sale in September 2007 priced at £50,625 OTR.