I did the claculations wrong on that picture again.
With a 3.32 final drive it would mean 178mph!
However, I've read 4.2, 3.32, 3.65 and number inbetween for the S3 gearbox, can someone find me a definite gearbox code or final drive ratio for 5th and 6th on an 8L Audi S3 then I'll update the first post with a correct picture/figures.
The gearbox code for the S3 is FMN mate, cant find the final drive ratio's at the moment.