How to tell which motor in a 1997 Mazda Protege?

Is there a way to find out by looking at the car which motor I have? I know it is a DOHC 16v. (5spd) I'm not sure if it is the 1.5l or 1.8l. Also does anyone know if these cars are known for having any problems other than routine maintenence? Thanks
It is the DX model, if that helps any.
 
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