My son had a little Caravette 2 and towed it with a 1.6i Corsa and still used the gears excessively. He then bought a 2.2 Ranger and said to me that he only realises now how much strain that Corsa took.
Just a reply to bring the posting forward under ACTIVE TOPICS.
Bridgid. If you still have your Corsa look for a Caravette 2. I have just towed one from Mossel Bay to P.E.
Wind 0 - 25 knots cross/tail with heavy rain for most of the way.
Speed 95+ cruising. Down to 80km/h in 4th up hills.
Fuel consumption 9,4l/100km. It will change with a head wiind. (8.8 town)
It was a far easier tow than my old VW Caddy with a Hobie 16 on the same road.
It is not viable to change your engine. Sell the bakkie and buy another one.
Would I fit a towbar to my wife's S60 auto for the odd 400km+ trip. Definitely not .
I hope this gives you a better idea.
Corsa bakkie is perfek om jou karavaan in jou erf rond te skuif. Moenie by die hek uit ry.