You yanks really like your Vettes dont you?
As far as pushrods I wasn't particularly clear. Overall the engine can certainly be lighter. The problem that I have is that they are an extra inertial mass. Also my understanding is that pushrod engines generally can't rev as high as DOHC or similar engines. There is a reason after all why the vast majority of car companies have adopted DOHC or similar in their performance cars.
Ah well, looks like you've got all the answers for me. Although for some reason I still prefer the BMW. Maybe its just a matter of indoctrination along the lines of European cars are always better. Maybe when the new M3 comes out the equation will change. Intersting mileage figures though.
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