Originally Posted by Hoosiers
I understand that the industry in now slaved to MPG and emissions, but GM gets 26mpg out of the huge Vette V8. The next C7 5.5L DI is said to improve even further on that, pushing highway MPG into the 30's. So no, turbo is not the only solution.
That is through cylinder deactivation, direct injection and gearing but does not lower CO2 as much which doesn't matter in the US but sure does everywhere else. The Vette is also much smaller and lighter by its sparse nature- the build quality levels are night and day.