All Fieros are Coupes irregardless the model. Two door, two passenger. The titles on all the Fieros I've owned showed CP as the body style.
In 1986, there were three models.
The Base Coupe, which had a 4 cylinder engine. It also had what's come to be known as bumper pad fascias. All Base Coupes were 4 cylinder.
Then there was the SE. It was available in either 4 cylinder or V6, had the Aero ground effects package. This is the same body trim as the Indy and the 85GT.
Next in line was the GT which is known as a Fastback. GT's only came with a V6.
The spoiler was an option in 84, 85, 86, and 87, and also on the 88 GT. It was part of the trim package that designated the 84 Indy and the 88 Formula and couldn't be deleted from those trim levels. The spoiler couldn't be ordered on the 88 Base Coupe. Except for the Indy and Formula, the car could be ordered with Spoiler Delete, or with Luggage Rack.