2014 BMW M4 Engine Details Revealed Via VIN Info?

There has been no shortage of speculation over the oily bits of the next-generation mid-sized M car from BMW. With the unveiling of the 4-Series Coupe concept, the general outlines of the 2014 BMW M4’s form have become clearer, but there’s still a cloak around the engine. Or is there? According to VIN information dug up by F30 Post, the upcoming…