Most powerful BMW M5 ever spied testing

The BMW M5 has been around since 1984 when it was introduced at the Amsterdam Motor Show. At the time it was introduced, the original M5 was the fastest sedan in production. It has seen many modifications since those days, but one thing is for sure; the M5 continues to see more power each time. BMW is currently preparing the most powerful M5 ever brought to the market. The new sports sedan will be launched at the Paris Motor Show (next to the new X3) in October and will go on sale early in 2011.

Gone are the days when BMW used the V10 S85 engine as was done with the BMW E60 M5. The new 2011 M5 will be powered by the same turbocharged 4.4 liter V8 engine used in the X5 M, but tuned to deliver an impressive 572bhp and 650 NM of torque. An impressive jump from the 500bhp of the previous model. It will sprint from 0 to 62mph in just 4.4 seconds and hit a limited top speed of 155mph or 188 mph with the optional M Drivers Package.

The new M5 also gets an electronically-controlled limited slip differential and Dynamic Performance Control, which sends extra power to the outer wheel when cornering to reduce understeer.