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

There was an old episode of Top Gear where they ran a Prius around the track flat out. They followed behind with a BMW M3. The M3 was driving at a leisurely pace to keep up with the Prius and had better gas mileage as a result.

Big engine slow > small engine fast.