Key context: thermodynamics dictates that heat engines waste a lot of energy.
Credit: Karin Kirk
this post was submitted on 11 Nov 2024
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It's even worse when you take a bunch of the small percentage of energy the heat engine successfully turns into motion and then use it to heat up the brake discs.
Being able to recapture kinetic energy into a battery and reuse it later helps overall efficiency a lot.
Plug-in hybrid? Aren't they worse than both, because of the weight of motor and battery?
Yes, unless your only metric is fuel consumption or range with a given tank. Then they're pretty strong.
Only 70% going out the tailpipe.