Originally Posted by Citizen Z
Displacement always sacrifices fuel economy, even with high technology trickery. The future is not in displacement because the future is not in gasoline.
If high displacement=low fuel economy what is the G8 GXP with a 6.2 liter V8 doing getting almost equal fuel economy as the 4.0 liter V8 that is in the M3( 13/20 for GXP and 14/20 for M3). And the G8 GXP weighs more then the M3. Or the Camaro SS with the same engine gets 16/25?