In addition to several pedal bicycles, I have a Kawasaki Ninja EX250.
0-60 in under 6 seconds, top speed of over 100mph.
Minimum mileage, with a passenger, lots of hills, and driving fast because its fun, is 50mpg.
If I am trying to get good mileage out of it, it approaches 80mpg.
Costs a few grand brand new, one or two grand on CL a few years old (usually very low mileage, as people learn on it, then "upgrade")
I also frequently commute via rollerblade, which is slower than biking, but more fun.