we tow a lmc 510 rd which is quite heavy,with a 2.2 frontera.and its great,dont come out of top gear on most hills.around m5 m4..
Fronteras are horrible, a fact reflected by their low resale value.
I had one and lost a packet, it was as manouverable as a narrowboat on a canal and I'll never forget the look of fear in another Frontera drivers face as we approached each other at 50mph on a narrow but straight Dorset lane.
Don't go there. If you want a tractor get a Daihatsu 4track, they are agricultural but good and will pull forever.
The Frontera is a joke and the worst mistake I ever made.