This year three models comprised the Riviera line.  The coupe, Convertible, and the Riviera T-Type.  Base engine for the coupe and convertible was Buick’s 4.1 liter V6. An Oldsmobile built 5.0 liter gas V8 was optional on the coupe and the ragtop Rivie.  A V8 diesel was available only on the … Continue reading 1983 Buick Riviera Manufacturer Promo