As anecdotal example: My diy ebike will do about 80km unassisted (aka peddling for show) with .85kwh. Looking at what scooter should be able to do when not going too fast is a big order of magnitude (but not two) in kwh/100k. Though headwind is going to matter more on a bike/scooter than a car. I guess with a more efficient motor you could get up to two.