Mine tows great with the 1.6TDCi engine. I have a 1 tonne four wheel trailer and have pulled it a couple of times fully loaded from Ireland or Wales to the south of France without any issues, just dropping down a gear on the motorway when hitting the mountain regions. Constant 65-70mph alll the way stoppping only for fuel and toilet breaks.
I thought I had done the clutch once when pullling uphill out of the local quarry loaded up with sand - it was a choice of ruining the tyres with wheel spin or controlling it on the clutch. Plus when I told the loader driver that I wanted 1 tonne he thought I was asking for 1 cubic metre with is more like 1.5 tonnes! I wasn't going to start shovelling it all back out.