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

Take a small person and a muscular person as an example and have them move multiple 25lbs bags of sand, one by one repeatedly.

Small person can do the same lifting capacity as the larger but will require more energy/effort to do the work.

The larger person will use less energy, and require less effort to do the same amount of work.