The Montego/Maestro 2 liter series was the most underrated Rover product. Probably, because models with alternative 1.6 and 1.2 liter powerplants were notorious for their unreliability.
This series was developed in cooperation with Honda and the later versions ended up being equipped with robust Honda gearboxes, after Volkswagen supplied Rover with shoddy ones.
I had a 1986 model which I bought from the garage where I was employed, in Germany. The car was damaged in a frontal collision and I ended up repairing it myself. The car drove and handled at least as well as the German competition, in that size/price class. The low-end torque enabled the vehicle to tackle mountain roads, without any need of a turbocharger.
As Germans often say, "The British start off with a good idea. But, never finish what they started". As far as this vehicle is concerned, I can vouch for that. The car was brilliant, except that the engineers didn't bother to incline the engine for lower hood clearance and to avoid damage to the oilpan which was frequent on the MG, due to the lowered suspension. 2nd miserable fault: The electronic fuel injection/ignition was made up of a grabbag of products. The Injectors were from Bosch, the airflow measuring device (I forget what it's called) was produced by Hitachi and a vacuum valve was produced by General Motors. The board computer was called British Leyland. But, who knows what was in there.
I once had the idea of washing the drivetrain with pressurized water. This is possible with carboureted engines with conventional ignition. However, doing this with an injected Maestro can be very expensive. After having done so, the automobile never ran right again. Even after having it repaired in Saarbrücken, Germany by a dealer who had a low parts inventory and was lacking special tools. The dealer wasn't therefore capable of diagnosing the problem and ended up sending the vehicle to the local Bosch franchised repair facility. They ended up replacing the airflow sensor and the board computer. The latter was replaced with that of a Jaguar. Then former was brand new and the latter was used. This costed over 3,000 Deutsche Marks (approx. 1,000 Quid) and the vehicle never accelerated to it's former potential.
Had Rover at least have built these vehicles with a Bosch-type test socket, the repair would have been much less costly and time consuming.
Otherwise, there was little to complain about this vehicle