German Car Forum publishes a new rendering of the 2014 BMW M4 from French Magazine Motorsport designed by Jerry Alvarez. Based on this rendering, there is an aggressive front bumper taking design cues from the 1M and M6, carbon fiber rooftop like the M6 Coupe, enhanced side lines for a muscular look, M wheels, and hood bulge. A BMW VIN registered with the UK authorities reveal that the F80 and F82 M3 and M4 will no longer have the V8 naturally-aspirated engine. It will be replaced with a new inline-six engine called internally as S55, delivering 415 horsepower. For now though, we still need to take this information with a grain of salt.