Quote - Horsepower (hp) is a proper Physics term but there are a slew of equivalents: N*m/s (SI), J, erg, ft-lb/s, calorie, Btu, kW.  All of these represent units of Power.

1 hp = 0.746 kW

Robert, you're scaring me. ;) The only way I'd be able to judge that little compressed air car, is to get in and drive it. If I didn't get run over on Greenway, that's one point in its favor. Then if I plug it in at home, and the circuit breaker doesn't explode, it's a go. (Wonder if that's a 110 or 220 plug it needs?) Doesn't even need a cupholder. The '66 Mustang didn't have one, either. Come to think of it, neither did the Chrysler Laser.