Swapping your car's engine with something better can create a very pleasant Frankenstein. Like this Beetle with an Alfa Romeo flat-four. It's politically incorrect, but still very cool.
But which is the greatest of them all? And let's not go crazy this time.! No, the radial-powered Goggomobil is not what I'm looking for. The Traburg is more like it, just like giving more revs and power to tiny cars. That's the way to do it!