“Wrong... “
Wrong. Horsepower does work. The max work per unit time is limited to your max hp.
Depends on fast you want the work done. “Give me a lever and I will move a mountain”.
We made a mistake working towards high RPM short stroke large bore. We should have stuck to long stroke smaller bore high torque instead.
Can you imagine what mileage and power a model T ford could get with Computer management, fuel injection and turbo charging?