Car ICEs have to be dirt cheap. Jet engines are expensive enough to include expensive goodies. For example, an Mercedes claims its F1 engine achieves 50% therm

Car ICEs have to be dirt cheap. Jet engines are expensive enough to include expensive goodies. For example, an Mercedes claims its F1 engine achieves 50% thermal efficiency. That's insane, and maybe double what a car engine achieves. It also costs $1million(???)/unit.