With the next M3 around the corner, engine rumors are heating up and those with inside sources are saying that BMW will use a V6, the rest of us have You Tube videos to analyze. There are three reasons why BMW would want to switch to a V6 from its traditional inline six cylinder layout: two improve performance, for marketing reasons, and to make Audi fans say I told you so (as in Audi used a turbo V6 in its RS4 many years ago). Clearly the first two reasons are significantly more likely to be true. The new V6 which would likely place the turbos between the cylinder banks could allow for better turbo response and the V6 configuration could make for a shorter engine. Using the V6 instead of an upgraded inline six seen in the 335i also gives the marketing folks the ability to differentiate the M3 from its lesser 3 series siblings. Words such as groundbreaking, bespoke and unique can be used to justify the M3's pricing premium. A different engine removes the 135i (with chip tuning) vs. 1M debate and dilemma and allows for a significantly bigger price cushion between a 335i and an M3. Not as strong of an argument as a high RPM V8 on the current M3 but the next best solution keeping fuel economy in mind.
Read Article