15. 1961 Amphicar
The Amphicar was designed to be a car and a boat, the problem was it wasn’t very good at either of these jobs. As a car the handling was average but the engine wasn’t particularly great and it wasn’t much of a looker either. As a boat the Amphicar was incredibly slow, with a top speed of 7 mph. It maneuvered through the water rather well considering it was a boat-car, but the biggest problem was that the Amphicar was not water tight. The car leaked from various places and the only reason the car stayed afloat was because the bilge pump was able to keep up with the leaks. If the bilge pump wore out, or was unable to keep up, the Amphicar would cease to be a boat and turn into a sinking car.