2012 BMW M5: The Twin-Turbo V8 Super Sedan At Play

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Loaded with a twin-turbo V8 rumored to produce 578 HP, can you blame the test engineers for driving the 2012 BMW M5 out in public to be spotted by the keen eyes of spy photographers? Interior pic below.

The new BMW M5's mill comes out of the X6M if Car is right, giving it a 0-to-60 MPH time of around 4.4 seconds. At the same time it'll reduce emissions by 30%. Sadly we've yet to spy a wagon