Before you read: These races were done on 5-lane freeways at like 3am with no cars around.
My buddy has a 2003 GTI 1.8T with Borla exhaust, DP, N72 valve, APR chip w/ 100 Octane option. I raced him on the freeway going up to 120 w/ my stock 2002 WRX and we were head to head, if anything I'd pull on him by about half a car. He doesn't want to launch his car, so we never race off the line, but he did admits that he’d lose. The only time that he beat me was when he pumped 100-octane gas in his car. With race gas he put about 5 cars on me racing from 60-120. The race gas makes a huge difference; he said it's something like 25WHP. (This was 2 months ago)
Just recently, I got a full exhaust (except the mid-pipe), Ecutek, K&N filter. Racing on the freeway from a 60MPH roll, me (91 octane), him (100 octane) we’d be head to head until about 120MPH then by 140MPH I’d pull on him by about 1-1 ½ cars. His GTI with regular 91 octane wouldn’t even have a chance with me on the freeway, let’s not even discuss it from a stop. I'm actually very impressed with his car. Stock they are fairly slow, but it can be made a lot faster with a couple of easy mods and some race gas. GTIs are very cool cars, I just don’t like the fact that they are FWD. I think the R32 AWD is a very nice car, even though I’m not a big fan of VW.