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I have driven my TT for almost 18 months (owened both cars this amount of time) and have been very happy with it.
The problem is most of time is spent driving it to work in the traffic (where the auto box is amazing by the way). On top of that the car doesn't feel that quick around the town and on slower roads becuase it doesn't really need to work to get the speed. So although you may actually be accelerating pretty nimbly, it doesn't really feel like you are. You just notice all the cars around you dissapearing!
The NA feels more nimble and faster, although it obviously isn't. That combined with the fact that the NA will happily drive around on normal unleaded and the TT only likes Optimax or BP Ultimate. The actual consumption isn't much better in the NA but the fuel is cheaper to buy and it adds up when you do say 12,00 miles a year.
If your happy with just the looks and the NA performance, get a 1999 (or newer) NA with your cash and be done with it.
I bought my TT after kidding myself the NA power would be okay. The NA was still on the ship from Japan at this point! I was after power though deep down.
The NA in real terms isn't that much slower either, it does get crippled by the TT in torque though, so keeping it in the right gear is more important. Also, if your looking to mod in the future months to get extra power, don't bother with the NA. They are not very tuneable.
You will also strangely find that the TT is cheaper to insure than the NA, and the UK TT is cheaper than them both.
Its all show and less go for me now