The Renault 20 (R20) and Renault 30 (R30) are two executive cars produced by the French automaker Renault between 1975 and 1984. The most upmarket and expensive Renaults of their time, the two cars were almost identical with regard to sheet metal and mechanicals; the R30 was the larger-engined and more expensive of the two. The two cars were easily distinguished between each other from their differing headlight configuration – the Renault 20 had two single rectangular headlights, whereas the Renault 30 had quadruple round headlights. The interior specifications differed substantially, however, with the Renault 30 having a higher specification in all models. Over 622,000 R20s and 145,000 R30s were produced in Sandouville near Le Havre, France.

The Citroën CX is a large, front-engined, front-wheel-drive executive car manufactured and marketed by Citroën from 1974 to 1991. Production models were either a standard wheelbase or a stretched, more luxurious, four-door fastback saloon, as well as a station wagon (estate), on the longer wheelbase. The CX is known for its hydropneumatic self-leveling suspension system, and its low 0.36 drag coefficient, normally noted as a vehicle's in French. Restyled as 'CX', the model name underscored this.