No
The Sport Coupes were exclusively the Turbo V6.
All Turbo V6's were 3.8's (No factory Turbo 4.1's).
Many times Regal in general are refered to as "Sport Coupes" because they are coupes and sporty (especially when compared to the rest of the Buick line-up), but technically only the Turbo Regal was the "Sport Coupe" in 1982.