Reality Bites said:you'll never see it go above 600 on an A3's tank!
i had the 1.9tdi (was an o3)....but the new 2l TDI isn't much different.
sticking to 75 on a tank i managed around 520 before running on fumes.
driving normally i managed 460-480. (90mph on motorways and getting up to speed pretty quick)
90mph is too high rev wise. I don't know about the 1.9 but the 2.0 with DSG definately goes above 600 @ 70-80 mph and it is accurate!