If you can produce the same horsepower with engines of different sizes, why are larger engines built at all?

Question

If you can produce the same horsepower with engines of different sizes, why are larger engines built at all?

In: Engineering

Answer 1

Larger ones could also be lighter, I know it sounds ridiculous but think about it. They use the same materials to work on it, but one is more condensed, so the smaller one would have more mass and thus more weight