Hi Brian,
You don't say if the Audi is the 160 bhp version or the earlier 140 bhp, or if it's a quattro, or if it has the 6 speed gearbox.
Aside from that, it's about a 90% to 93% match - so that's just above the 85% guideline and way below the maximum allowable tow weight. If you have towed before then you'll probably agree that this is an OK combination.
If the car is the quattro version, then that'll help.
If the car has the 6 speed manual gearbox - then the "overdrive" 6th gear may not be useable except on motorways.
Robert