Hi,
We had an X plate Bora 1.9 TDI - sold exactly 2 years ago - and it was fine towing our earlier Eriba Puck L and the newer Triton (1200 kg MPTLM). Golf before that and C270 CDI now (which is a great tow-car).
6th gear was usable on the Motorway - think it was about 1900 rpm at 60 mph - so over the edge of maximum torque. Often saw 40+ mpg towing the Puck L (MPTLM 900 kg).
Performance with the 130 bhp engine was fine, plenty of torque to pull 1200 kg.
The rear over-hang is longer than the Golf, so it doesn't dampen pitching motions as well as a Golf. But the Bora boot is much bigger.
Tow-bar - recommend a Brink or Westphalia swan-neck or detachable - and the tow-ball did seem to get quite dirty with exhaust smoke - which was quite close to the tow-ball. Squeaky ALKO coupling was an irritation if you didn't degrease each time.
Robert