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

A large heavy object takes less energy to maintain it’s velocity. So when a big car gets going on the highway it takes less gas to keep it moving. More gas to speed up but less while coasting. And since most long trips are mostly coastly you’ll get better mileage with a heavier engine. Roughly speaking.