Buick displayed one of the two special-built Riviera convertibles that would serve as pace cars at the 1983 Indianapolis 500 race. These front-wheel drive Riviera were equipped with a twin turbocharged 4.1 litre V-6 that generated 450 horsepower and came mated to a four-speed automatic gearbox. It has been reported that Buick built 500 replicas, but they were two-door hardtops and came with non-turbo engines. This was the seven-generation Riviera model (1979-1985).