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

Basically, large engines always have an advantage when it comes to peak efficiency, but an engine has to be built to match a load. Engines perform best at lower RPM but almost max. throttle. If you have a big engine giving 200 HP at low RPM and full throttle and a smaller engine giving 200 HP at redline RPM and full throttle, the small engine will be less efficient, and because it still puts out the same power, will consume more fuel.