What is this horse thing all about

Guess we should be like the aussies and use kW

When talking about farm equipment, it represented the number of horses a engin could replace.

Clearly OP is not into trucks, tractors or muscle cars. Easy on the accelerator on that Prius buddy.

Well it's quite simple, just imagine the peak performance of a horse. That's 14.9 horsepower right there. Easy. Simple. Elegant.

550 ft.lbs. per second

746 joules of work is equivalent to 1 horsepower