The "classic" Prius fits my road bike with the wheels on. I just hold it by a seat stay and roll it in while it's leaned way over. But the passenger seat can't be quite all the way back. I have an REI tent groundsheet to keep the floor clean if the bike is wet.
It would be tricky to load two bikes. It would take two people to carefully lift the second bike, since the cargo area isn't very tall. And you'd need some good mover blankets or other padding.
To carry more bikes, I've seen trailer hitch bike racks on Priuses.
Upside: My 25 to 30 minute drive to a group ride takes .5 gallons of gas. It's easy to get 50 mph on highway driving, and 60+ in rush hour stop and go.
Last edited by rm -rf; 10-15-14 at 02:31 PM.