Yet despite the 25 percent reduction in capacity and the loss of two cylinders, the new BMW M division engine delivers 10 hp more than its
predecessor, thanks to patented induction process that is claimed to provide vastly improved levels of combustion efficiency, in the process preserving an illustrious 27 year tradition that has seen each incarnation of the M3, the
ranks of which have now been reduced to a single four - door sedan
model alongside two - door M4 coupe and cabriolet
models, boast more firepower than its direct
predecessor.