I have towed my caravan with a few cars now, a 116 75 tourer, a 160 mapped saloon (not as good as the tourer surprisingly) an old Mazda 6 and my mondeo.
Both 75's never had a problem and would stil manage 350 miles to a tank towing which I though was pretty good especially considering they are autos. My van weighs about 1350kg so a little lighter than some but always towed without issue. The 2.5 auto I've got now is horrible compared with the diesels but still tows well at speed.
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How to view a car - everything you need to help you inspect a used car
VIS motor tester avalible to local members
Injector removal tool and auto gearbox pressure tester now available