Quote:
Originally Posted by WallieX5
I think the engine size will be bigger than 3L if the horsepower is 450 except BMW is doing something extraordinary with the engine which seems unlikely given its price point.
911Turbo 520HP/3.8L = 139 HP/L
911Turbo S 560HP/3.8L = 147 HP/L
If the M3 is comparable to the Turbo S then 3.0L engine will give 441 HP
But if more comparable to the Turbo then 3.0 = 417 HP
However, if the engine size is 3.3 then HP will fall between 458 and 485. Whatever the engine size, I think the output per liter will be more comparable to the 911 Turbo than the Turbo S.
In conclusion
If HP is 450 then engine size is 3.3L
If engine size is 3.0L then HP is 417 HP
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An interesting post, but your conculsions may be a little off. Mercedes get 178 hp/l from their very affordable A45 AMG engine (2.0 giving 355bhp).
Bets for specific output per $ are off when it comes to FI, just look at 4cyl factory 400bhp Evo's (but admittedly their lag is horrific).