The problem there is you are asking a question that only 2-3 people could possibly answer, none of which are likely to be online right now, have even attempted a top speed run with a decent GPS system, or perhaps even belong to this club.
If you're using the NA stock non-LSD diff, the 5spd box it's going to be *far* lower than the TT. The ratios are all wrong for high speed.
If you had stock wheels and the non-LSD diff I believe the max at the TT rev limit is 164mph, however you would need the power to pull to the limit, which I seriously doubt a stock TT can do (even with the 6spd, my stock TT was a very long way off the limit). If you get more than 155mph on a gps I'd be amazed.