[epbrown]

Well, the 16-valves weren't available every model year (1987-1991), so telling us that would help. The 944S has the same front end as the turbo, without the rubber bumperettes. They also have "16 ventiler" in script on the body molding ahead of the doors and on the airbox you see when you open the hood, right at the front of the engine. There's also the model badge on the hatch lid, which will say 944S rather than 944.

Emanuel