Quote:
Originally Posted by sgtlethargic
"All else being equal", would a motorcycle or car engine of the same displacement be better for a high-MPG car? In general, don't over-analyze it, please.
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All things aren't equal here
If you want to develop a high-MPG vehicle in reverse-trike fashion, I'd think it'd be a lot lighter than a car.
If you can make it light enough so that a 125 or 250cc FI engine becomes an option, it'd beat a small car engine on displacement alone .
(The smallest FI car engines you'll find are likely 1L - I doubt the 660cc Kei cars made it to the US ?)