My '87 Regal, when stock, was a Y56 "T Package" Regal. Mine had an Oldsmobile 307 V8 (other engines available) and chrome trim (black-out was a separate option) with aluminum "T-Type" style wheels. I also had the same T badges on the fender and the horn button. Not "T-type." Just "T." Check the trunk sticker if you can for codes. I also had identical style "REGAL" badges to the rear quarters. And if I remember correctly, 1987 "T package cars" also received the "Touring suspension" as part of the package. This is pretty much the T-type suspension. Check for decent sized front and rear swaybars.
Lastly, I see this car has a "third eye" brake light inside, like all of the later G-bodies. All this being said, I have to wonder if this is a later '80s Regal (thinking '87) that's had the front fascia replaced at some point.