why do some smaller engines have lower gas mileage than some larger engines?

Question

why do some smaller engines have lower gas mileage than some larger engines?

In: 208

Answer 1

Engines typically have a very efficient “efficient speed”, and a fairly poor “inefficient speed”.

When a tiny engine is being pushed too hard, it may be small, but it’s having to work extremely hard, in its inefficient range, to do so.
On the other hand, the lager engine can sit happily in its efficient range, doing the same work with less effort.