Engine compression ratio and fuel injector size?

Was wondering if anyone could tell me the correct compression ratio for a 1995 MM 2.4l. I keep getting different answers. The answers I have now are 8.5:1, 9.3:1, and 9.5:1. Was also wondering about injectors that would fit this year in a bigger cc size. Was told any high impedance mitsu injector. Any help would be appreciated. thanks