We had an Opel and my husband's brother put a racing motor in it. It was a small car and you should have seen the looks on drivers' faces when I could outrace them. It was a lot of fun.
We put a low-rpm supercharger (not a turbo) on a Dodge Omni some years ago. You should have seen the Corvette drivers' eyes bug out when they were out-accelerated by an Omni.