All models with the 1.8l (7A-FE) have 4 wheel discs. To the best of my knowledge, the models go CSi, then Conquest, then CS-X, then RV, then Ultima. RV is Seca-only and Ultima is auto-sedan-only (info from a '94 copy of Wheels that I had lying around). All models were available in 1.8l so yours could be anything. As per usual, most of the differences between variants are just specification :)