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Rumors are flying left and right on what BMW has in the works to power the next-generation M3/M4, with four potential engines being spoken of. These include a turbocharged 4.4L V8, turbocharged 4.0L V8, a 3.2L inline-6 with three turbochargers and now BMW has filed a patent for a uniquely-designed twin-turbo V6.
And while the schematic is probably a bit over-the-head to us laymen, BMW breaks it down in their patent application: “…the principle of this turbocharger layout invention (#1) in a 6-cylinder internal combustion engine in V configuration (#2) with a first cylinder bank (#2a) — pictured as 3 circles and labeled with Z — and a second cylinder bank (#2b) — also pictured as 3 circles labeled with Z.”
In other words, the exhaust gases of all six cylinders are routed into one turbocharger – which BMW has said could possibly be a twinscroll unit – and once the gases exit from the turbo, they can be routed either into the exhaust system or another turbo. So in the possibility that there would be another turbocharger involved, it would be a sequential twin turbo (think bi-turbo) setup and would also allow BMW to use different sized turbochargers.
Which of these four options will BMW choose for the next M3? Only time will tell.
Despite reports to the contrary, new rumors suggest the BMW M3 sedan will live on. The bigger news, however, is that it will be the only M3 model offered.
Not to worry two-door lovers. BMW has not forgotten you. There will in fact be a coupe model, it’s just that it will wear the M4 badge in keeping with BMW’s new naming policy that will have sedans wear odd numbers, while coupes and others will get the even digits.
As perhaps a sign of just how different the upcoming M3/M4 will be compared to its “regular” counterparts, BMW has reportedly given the new M cars their own chassis code. Any BMW enthusiast can rhyme off their chassis codes, from the E30 M3 to the E90 M3, and while it was expected the new M-powered F30 3 Series would be called the F30 M3, it will instead be called the F80. So for fun, mess with a BMW fanboy today and ask him what he thinks of the new F82 M4 coupe.