In a message dated 2/29/12 2 48 28, pantera874 at t-online.de writes: > Porsche 917 is a V engine, the Corvair is a boxer. These are totally > different constructions and not compareable. > >>>The Porsche is a flat-12, but I assume you mean it's a 180-degree V-12 and not a boxer--same as the Ferrari... Mike