It’s better to choose fluid in combination of 1991 year, 2.3 volume of motor and engine code of B230E. Make sure you service system at Volvo with installed 2.0 engine correctly. Only Green antifreeze type is suitable and you’ll need 8.5 liters of it. Only exact type of antifreeze will suit Volvo 740 cooling system. There is no chance 1989 740 engine will work efficiently with bad cooling.
So, don’t choose different from Green coolant and obey the number of 9.5 liters. There is a big plus in servicing 1989 Volvo 740 with all regulations. 2.3 740 motors of 1986 year will serve more by optimal service. There is an important thing for B200F engines of Volvo’s production – they expect good service.