VW in general are not quick cars. In the simplest form, they are commuter cars that feel fast because of their low boost turbochargers. That in mind you can make one considerably faster by adding a chip for not much money. My dad had a TDI which had a fun band of torque, but it's drawback was that it weighed too much. He traded it for a GTI which is considerably more fun; especially through the twisties, but in a straight line won't hold with a mustang GT (comparably priced). If you're looking for a good race with a VW owner, search out a golf R, you'll have some fun.
2012 Mustang v6
1969 Porsche 912