The system fitted to 8-valve models before 1990 is known as motronic ML4.1. The fuel injection side is very similar to the LE/L3 Jetronic systems fitted to the 1.8 models. The control unit is located behind the trim panel in the drivers footwell.
1990 8-valve models are fitted with a system known as motronic M1.5. The main difference is in the control unit, which triggers the injectors in pairs instead of all together as previously. There are also minor differences in the fixings of the fuel pressure regulator and the fuel injector rail. The fuel pump is now immersed in the tank instead of being fitted along side.