The Ford Territory Diesel engine is a Land Rover engine used int he Land Rover Discovery. This motor has several common faults to keep an eye out for.
The engine runs a timing belt instead of a chain. There is actually two belts. The main belt on the front of the motor and a diesel injection belt on the rear one.
The thermostat housings are common for leaking. Along with turbo failures, EGR faults and the known split inlet manifold issues. You can read up on these issues by clicking here.
In summery the Ford Territory diesel is basically as reliable and costly as a Land Rover to keep on the road.