Check this one out.
This thing was built expressly for transporting Mercedes race cars. At over 100mph. The way Leno explained it (he has one, of course), Mercedes, when they had to work on one of their racers, didn't like working away from home, so, if they had mechanical difficulty, they'd load the car and drive it to the home shop back in Germany. No matter where in Europe they were. This thing was a legend back in the day, they always got there and back in time to race. Leno said it would do well over 100 with a car on it.
ETA: IIRC.