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

Power and demand plays a factor.
The more power an engine has, the more it can generate at peak efficiently.
See this a lot with semis, 2 identical trucks set at different horsepower ratings, the higher power always gets better fuel mileage.