I have been towing for some 30 years and now tow an Elddis Odyssey 432 of 2004 vintage.I tow it with a 2012 Qashqai with the 1600 tdci diesel.It tows very well and is probably the best tow car/ caravan combo that I have had.
I get about 35 mpg towing and 60 mpg solo so am well satisfied.
Power and handling with a caravan of 1450 mtplm at about 85% is fine and I have no trouble keeping up with traffic within the legal parameters
How the heavier new X Trail will fair with this motor , iam not sure.