Horsepower vs Torque

Torque describes a turning effect, commonly quoted for engines in pound-feet or newton-metres. Power describes the rate at which work is done. Horsepower is one unit of power. They are related measurements, not competing labels for the same quantity.

How engine speed connects them

For mechanical horsepower, torque expressed in pound-feet multiplied by engine speed in revolutions per minute and divided by approximately 5,252 gives horsepower at that same engine speed. The Ford technical glossary documents this relationship. The unit convention matters: the same numerical constant cannot be used unchanged with newton-metres, kilowatts or another horsepower convention.

Reading a Dodge specification

A Dodge's advertised peak torque and peak horsepower may occur at different engine speeds. Do not combine those two peak figures as though they were measured at the same point on the power curve. Likewise, an engine-output rating and a chassis-dynamometer wheel-output result are not automatically comparable.

Compare context, not just the biggest number

Record the model year, engine, application, units and rating standard wherever the source provides them. Vehicle performance also depends on the complete vehicle and conditions; a single engine figure is not an independent acceleration test. If the source does not provide engine speed or measurement context, leave that information unknown instead of calculating an apparently precise specification from incomplete inputs.