What is the horsepower of one engine in a Boeing 747?

A Boeing 747 typically uses four engines. The older models (like the -100, -200, -300, and some -400s) used Pratt & Whitney JT9D engines, which produced roughly 50,000 horsepower each. Later models and variations might have different engines with slightly different horsepower ratings. So while 50,000 is a good approximation, it's not universally precise across all 747 variants.