Initially it was believed that the 2014 M3 would see a tri-turbo, straight-six engine, but now a BMW insider is claiming that a 3.0L, twin-turbo V6 is in the works. In a way it makes sense, considering BMW is outfitting its M5 and M6 models with 4.4L, twin-turbo V8 engine.
Either way, one thing is for sure: the next-generation M3 won’t be seeing a naturally aspirated powerplant which it has had for the past 26 years. Natural improvements on the next-generation M3 include lighter weight components, helping it shave a few more pounds, and a possibility of electric power steering. Transmission options should remain six-speed manual with an updated seven-speed dual-clutch option.
Rumor has it that for the first time, the new BMW M3 sedan will surface first with the coupe following afterwards.
[Source: Inside Line]