The extract from honest john is actually refering to the old shape vectra (pre 2002). Honest John is actually quite complimentary about the ne one, especially the 1.9CDTi engine! http://www.honestjohn.co.uk/road_tests/index.htm?id=151
Andrew
Lisa,
The new Zafira 2.2 Direct petrol and the 1.9CDTi have max towing weights of 1500Kg and will both tow your Dart well. We have a 1.9CDTi 150 and it is great!
Andrew