What is the worst car you've ever had?

We all have had an old beaten car, a car we didn't like but was what kept us moving and, sometimes, we even get to love them. I've had a lot but my worst nightmare was a VW Corrado G60. I bought the car because I needed something to get to work, I was kind of desperate and the car was just a beauty. I didn't the right research and got it. I regret it since the very first week with it, alternator stopped working, then starter, then fuel pump, the list goes on and on. The prior owner took the supercharger off so it was a G60 naturally aspirated, yeah like an Audi TT without turbos or a GT500 without supercharger. I invested a lot of money on it, nothing seemed to work. We even changed the engine block and did something interesting with it, we put a 2.0L block from a MKIII Jetta with the 1.8L head cam from the Corrado. On the highway there was no car that could catch me, in any shift above 3rd the car kept pulling and pulling. In a stoplight it was a complete different story, cars left me behind by 3 or 4 cars, same cars that I just pulled in the highway. Long story short, I was willing to pay for just getting rid of it, the car was a headache on 4 wheels.

What has been your worst car? What would you call your nightmare on wheels?