"250 mpg car?"
I'm on it Terry.
Closed Otto Cycle Engine (Argon , gamma 1.67 12 to 1 compression ratio)
using hydrogen peroxide (HO-OH) fuel.
If HO-OH powered engines are good enough for the US Navy. :-)
81% thermal efficiency vs 65% efficiency for a 17 to 1 Diesel open-cycle on air.
I keep this engine calculator stored in my documents folder.
