Click here for more pictures of the new BMW X6 SUV-coupe

This is the all-new BMW X6 sports activity coupe, set to make its worldwide debut at the Detroit motor show in 2008.

And the ‘crossover-SUV’ will feature the most powerful engine BMW has fitted in an X model – a twin-turbocharged 4.4-litre V8 developing 400bhp and 450lbs/ft of pulling power.

This means the two-tonne BMW X6 SUV-coupe can sprint from 0-60mph in just 5.3 seconds – almost as fast as the last-generation M3 – and on to a limited top speed of 155mph.

The BMW X6 is the Munich firm’s hotly anticipated coupe-SUV crossover, featuring a raked, coupe-like bodyshape coupled with off-road ability.

Featuring a permanent four-wheel-drive setup dubbed “intelligent xDrive” the new BMW X6 can transfer its power to any given wheel, and should continue BMW’s tradition of high-riding X models with outstanding on-road ability.

Based on the same platform as BMW’s best-selling X5 SUV, the BMW X6 features four sculptured seats and a luggage space of 25 cubic feet, which the manufacturer claims can “store four full-size golf bags in the luggage compartment – even with four people riding in the vehicle.”

Prices for the new BMW X6 have not been announced, but expect to pay around £50,000 for the range-topping 4.4-litre V8 model when it arrives next year.

Click here for more pictures of the new BMW X6 SUV-coupe