Although BMW thought it was putting the M3 sedan prototype through its paces in secret, our spies foiled the German automaker's plans.
While it's long been known that the next M3 would utilize a downsized, forced-induction engine for improved fuel efficiency, persistent rumors have suggested that the BMW would eschew its traditional inline-six cylinder configuration in favor of a (blasphemous to Bimmer fans) V6.
However, BMW North America president Ludwig Willisch has confirmed to BimmerPost.com that the new M3 will feature the tried-and-true inline-six layout. Willisch stated that the automaker had considered using a V6, including a version of the current M3's S65 V8 less two cylinders, but in the end the idea was deemed unsuitable.
Still remaining is the question of how many turbos the motor will use. Bi- or tri-turbo setups are possible, and BMW may employ an electric turbo, which the automaker filed a patent for last November. An electric turbocharger uses a small electric motor to power its turbine during the transition from idle to load, greatly reducing turbo lag.
The next BMW M3, which may wear the M4 badge in coupe and convertible form, is expected to debut in late 2013 or early 2014.
