Originally Posted by Mike in CA

Simplified drivetrain, better traction over the driven wheels, more interior space, good aerodynamics (no radiators up front). In the '30's F. Porsche admitted to being influenced by the Czechoslovakian Tatra automobile which was a rear engine and air-cooled design.

Originally Posted by ADias

Alex: re the 991 wheelbase apportionment please remember that the engine is in the rear and the rear axle is in front of the engine. Therefore a wheelbase increase will push the engine backwards re to driver position increasing backseat space. The latter will be the marketing angle.

I suspect that increase will allow homologation of a mid-engine version for motosports. It will not be a 911 but it will resemble one.