This is one of those tiny "Smart Cars" and a Footbike fits easily in the passenger seat.
Here we took four Footbikes with us on a Jeep Wrangler.
We have a Thule rack that we use on the top of our Tent Trailer that works great.
I've heard that the Europeans use a Yakima space case on the top of their vehicle and they can fit a couple inside safe and secure.
I've helped many people fit their Footbikes in many different types cars. In the trunk, in the back seat, in the passenger seat.