Over heating, after 20 minutes of driving - 1997 Land Rover Range Rover

Radiator cooling fans not working? The ECM is protecting the engine by shutting it down.

Try back flushing system with cooling system cleaner.

that sounds like a air lock or a faulty thermostat hope this helps

This is probably the ac clutch cycling, which is normal. Does it do it when you turn it to max?

Usually the problem with no heat and overheating is low coolant, thermostat, or a faulty water pump impeller.
The radiator may not be full of liquid coolant, or the pump may not be moving the coolant thru the block.

Repair coolant leak.
If you cannot locate the leak, run a pressure tester and try to locate the leak.

Thats definatly a crankshaft positioning sensor the reason why it dies after 20 minutes is heat expand and cold retracts kinda the same with the senor as it heats up it loses contact it is located back side of the head on the upper right about an inch below the valve cover

When your driving say about 20 or 30 minutes, the car, no matter what, just dies. If the engine cools down, it will start and run just fine, for about another 20 or so minutes, and same thing? Change the coil. its bad, it over heats, and pow. when it cools, works great. Had that happen to me. hope this is the problem

This is a problem with the fuel pump. When they age, they tend to "fail" at certain intervals, due to heat expansion. The only way to remedy this is to have the fuel pump replaced.

Have you checked your alternator?