How we worked it out
Updated as you change the numbers.
- HP = torque (lb-ft) × RPM ÷ 5,252.
Method and assumptions
One mechanical horsepower is 550 ft-lb per second, so horsepower = torque × RPM ÷ 5,252 (where torque and horsepower curves cross). The drag-strip formulas are empirical estimates of power at the wheels; traction, gearing and weather all affect real runs.
Questions
What horsepower makes 400 lb-ft at 5,252 RPM?
400 hp: torque and horsepower are equal at 5,252 RPM.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.