It’s better to choose fluid in combination of 1991 year, 1.9 volume of motor and engine code of DKZ(XU9JA). Make sure you service system at Citroen with installed 1.4 engine correctly. Otherwise ZX made in 1993 won’t serve you long enough. For Citroen ZX it’s important to have optimal antifreeze inside. For filling up the system you will use 7.5 liters of special Red coolant type.
If you choose other than Red coolant or use less than 7.5 liters, you can’t expect normal work. It will be advantageous to follow Citroen’s rules for 1995 ZX service. There is an important thing for KDZ(TU3M/Z) engines of Citroen’s production – they expect good service. Providing you keep the rules 1.9 motor installed in ZX of 1992 year will be long lasting.