Xlphillips, I can heartily endorse the Grand Cherokee if you are still considering that option. From what I have read on other threads, the GC V-6 gas engine (rated at 6200 lbs for towing) could comfortably handle a TT in the size range you are considering, but we opted for the 6 cylinder diesel to tow our 21 foot TT (3700 lbs dry and probably 4500 fully loaded) because we were planning a trip through Colorado. Based upon a year of traveling and camping with a 2011 Honda Pilot
as our tow vehicle, I was confident that the Pilot (250 hp) could do the job, but we were at the Pilot's max tow rating and felt the mountain passes would be a real strain on the car. The diesel performed flawlessly, and it was a special pleasure to hardly hear the engine at the low rpm's (around 2000) that the engine maintains while towing at 55-65 mph. The engine temperature climbed on the long 7% and 8% grades up to the high passes (Loveland, Vail and Wolf Creek), but I found that the temperature would stabilize in the quadrant of the gauge below the hot zone quadrant when I kept the rpm's at around 2000, where the car achieves maximum torque and just purrs along. Towing mpg is great -- 16 mpg while towing on our 4200 mile trip and 30 mpg highway when not towing. Good luck on whatever you decide!
2109s - '14 Jeep Grand Cherokee diesel