we towed with our 3.7 petrol cherokee for the first time this year,its a great car but having towed with a 1.9 diesel for the last 2 yrs i can see why people like the diesels better for towing.on the flat roads and pulling away from the lights etc, i found no differences really but when you hit the hilly bits the diesels are far better in my opinion.the 3.7 is a good car though,and bits like the auto box and the cruise control really made our 380mile trip more pleasurable.