Quote:
Originally Posted by Livininthinair
A Rotary engine could be used under the 2014 energy equivalency rules due to there being no mandate on displacement or # of cylinders ect. Rotary engines are not that great for fuel economy but poss. coupled with a hybrid/KERS system who knows. We may see all kinds of engine designs come forward due to more freedom in design...
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Mazda has had
Hydrogen powered RX8's on the road for a few years in Norway, and 5 years in Japan. Maybe that could work with a fuel efficiency formula.