What category is Horsepower in?

Horsepower is listed under the Engine category in the automotive wiki.

Engine

Horsepower

A unit measuring how quickly an engine can perform work — commonly quoted at the crank or wheels.

Wheel horsepower (WHP) accounts for drivetrain loss and is measured on a chassis dyno.

Advertised factory ratings are typically crank horsepower measured under controlled conditions.

PistonA cylindrical component that moves up and down inside the cylinder, transferring…
CrankshaftThe main rotating shaft that converts reciprocating piston motion into rotationa…
CamshaftA shaft with lobes that open and close intake and exhaust valves at precise timi…
Cylinder HeadThe top section of the engine housing valves, ports, and often the combustion ch…
Engine BlockThe main structural casting that houses cylinders, crankshaft bearings, and ofte…
ValvetrainThe assembly of valves, springs, retainers, rockers, and camshaft that controls …

Category: Engine · Updated August 31, 2026