Nissan could release a car with an engine rated at 50% thermal efficiency

Nissan is developing an engine for road cars that could reach 50% thermal efficiency, meaning the potential for much more fuel-efficient cars. An engine's thermal efficiency is a measure of how much of the heat energy generated by combustion is actually converted into useful work. A good rating for a road car is about 40% whereas 50% is a rating...

from Motor Authority https://ift.tt/3sBq1Yl