Back when GM introduced the "J" cars in 1982, the original 1.8L pushrod motor was not very exciting. Chevy quickly upgraded it to a 2.0L for the Cavalier, but the other divisions (Buick, Olds and Pontiac) had already found something better. They imported the Brazilian-made 1.8L OHC engine that was originally designed for the German Opel and used it in their "J" cars.
There were both turbo and non-turbo versions used from 1982 through