The Dymaxion Car [1], designed by Buckminster Fuller [2]. It wasn't pretty. It could seat eleven. It was difficult to drive. It killed one of its first drivers. But it got 30mpg (miles per gallon) and could travel at 90mph (miles per hour). Kind of a mixed bag for a car built in 1933.
Still, it might be somewhat fun to ride in it, as long as there's a trained driver.