The upcoming BMW M3/M4 has been captured in high speeds on the Nurburgring, but this is the first time it will be heard accelerating from a stop. The F80 M3 prototype was spotted by in California. Though this does not offer a footage of the M3 accelerating to redline or wide open throttle, it still gives us a pretty good listen at the car’s inline 6 cylinder S55 engine and exhaust.
[youtube]http://www.youtube.com/watch?v=gAp1vIef_5E[/youtube]Source: KKM3 from Bimmerpost