I'm not sure 75 hp would be enough, after all the Tesla weighs 2700 lbs empty (about 1000 lbs of that is the battery). If you want a 4 seater car with the same battery, it's going to be heavier.
My folks had a '62 Beetle.  34 hp IIRC.  Kept up on LA freeways, Mom, Dad, and three boys.