How much horse power does an army tank have?

The Vietnam War M48A3 90mm gun Patton tank had a 750 hp diesel V-12 engine.

The M1 Abrams has a 1500 horsepower gas turbine engine.

Most current production medium to heavy battle tanks will have motors rated from 900 - 1500 horsepower, while a light tank may range from 400 - 700 horsepower.