Towing a 33 with an xtrail is sheer folly. Actually you wont be towing, you'll be getting pushed. That combo will shunt like a mofo.
I have towed damn near every day of my working life for the last 30 years with a wide array of vehicles. Going for something marginal is false economy. A 4 banger will die in no time flat, they simply work too hard to be a long term project.
4 patrols used to a minimum of 450 thousand kilomters with the sum total of repairs being one starter motor and the usual brake pads wearing out etc.
The land cruiser is a more refined vehicle but not in the same ball park when it comes to longivity compared to the patty, transfer cases, clutches and gear boxs all fell to the work load.
The pommy offerrings are just shit. I dont give a tinkers how refined or comfy a landy or a rangey may be they are farken worthless to me sitting in the workshop getting repaired.
Current tow vehicle is the patrol with the twin overhead cam 4.8 litre in line 6 cylinder. Initially it was intolerable to live with the fuel useage but a decent header and exhaust system and an aftermarket ecu with a tune saw a good increase in useable power and a massive improvement in fuel economy. The torque of this engine is staggering. Nothing but nothing slows it down to any great degree. It just pulls and pulls.
In the original op's situ I would look very closely at the navara/triton/ hilux range. all available with a 6 banger of some sort and all chassised strong vehicles that can take the long road.