Towing

We have just bought a caravan weighing 1612kg all up. My 2012 Holden Omega V6 ute has a maximum towing capacity of 1200kg, but can be upgraded to 1600kg with the installation of an auxiliary cooling package, the tow bar maximum capacity is also 1600kg. What is your opinion on installing this cooling package initially for some short distance towing until we decide upon another vehicle on which to tow the van on some longer distances.

I have been towing with a Ford Territory AWD but have upgraded my caravan to about 2500kg and feel it is starting to struggle. I'm looking at 3500kg-rated vehicles, including the Ford Ranger, Mazda BT-50 and Jeep Grand Cherokee, because the Toyota LandCruiser is too expensive. I'm worried about the Jeep's reliability and resale but the ride is closest to the Territory and the power and torque are excellent.

I need a large car that will tow. I'm keen to buy a large diesel SUV, about three years old. I've been considering a BMW X5, VW Touareg or Range Rover. I've been in a Range Rover Sport and liked the comfort and ride but I enjoy German precision and reliability.

What do you think about using a Challenger LS 2.5-litre diesel to tow a 2.8-tonne caravan? Would a manual or auto be best for doing about 7000km a year?