The 2014 BMW M4 engine Spied

We have been following the BMW M4 in coupe for a long time, but we have never looked at a production ready 2014 BMW M4 engine prototype before. The new BMW M4 prototype is complete with headlights, wheels, exhaust and interior. The BMW M4 will go sale next year. The 2014 BMW M4 engine will replace the BMW M3 engine will be a little bit longer and wider but also lighter. BMW will replace the V8 in M3 with a new BMW M4 engine known internally as the S55 which is a six cylinder evolved from the N55.