1.8 or 2.0?

My son's car is a 2001 Mirage, says it's a 1.8, but when working on it, the pictures I find for the timing belt installation shows it to be a Lancer 2.0. At least that is what the online pictures for Auto Zone online repair guide shows. And other pictures I look for when I google for 1.8 pictures look like the 1.8 pictures on the Auto Zone site. I hope the parts I'm putting on it are correct, and Torque spec's.