According to an ex MGF/Rover engineer you must only go for the 1600 engine and not the 1800 engine as the 1800 is a bored out 1600 and they therefore have many problems as the cooling system was only designed...
A common fault on the MG-Rover 200/400/MGF/25/45/ZR/ZS models is failure of the heater fan speeds, usually on positions 1 and 2. The speed control is achieved by using different value resistors switched in...