BMW F10 M5 Spyshots reveal more details.

The BMW f10 prototype at the nurburgring has had another change of suit showing the Chrome door handles, also there seems to be some hidden detailing seen for the first time hidden under rear quarter wing.

It’s not a shock to learn that BMW plans to attempt to bring its M5 car to RS6-levels of power when the new M5 is revealed in 2011. That means that power needs to exceed the current model’s 501 hp, so BMW have been heavily modifying the X-Series 4.4 litre to bring power up to around 550 hp, or more.

This will be supplied to the rear wheels via the new seven-speed M DCT dual-clutch ‘box and probably a manual varient in 2012.

But it’s not all about pavement-pummeling power. The use of the twin-turbochargers and DI is as much an attempt to reduce emissions as it is to boost output, and BMW is intent on making the next 5-series, due out in 2010, one of its most fuel-efficient vehicles. That means that start-stop technology will be used on the engine (AKA Efficient Dynamics), to improve fuel economy and life on the Starter Motor.