The Renault Fiftie was a concept car presented by Renault at the March 1996 Geneva Auto Show^[1] to mark the fiftieth anniversary of the launch of the 4CV. The concept used a bright metallic yellow color, honoring the 4CV's "butter pat" nickname.^[2]

Styled by Benoît Jacob^[3] under the direction of Patrick le Quément, Renault's vice president of corporate design at the time,^[4] the Fiftie used a mid-engine/rear-wheel-drive layout, with its exterior styling drew heavily on its ancestor's — though with a two-door, mid-engine configuration^[4] rather than the 4CV's four door, rear-engine/rear-drive layout. The Fiftie was part of a trend toward retrospective designs, including the VW New Beetle, Mini Cooper and Fiat 500.

The Fiftie used an aluminum frame from the Renault Sport Spider^[5] and a carbon fiber body.^[1] Its interior used cotton, linen, and rattan extensively, with a picnic basket concealed in the boot/trunk. Front styling recalled the horizontal chrome 'mustache bars' of the original 4CV, with the addition of distinctive apostrophe-shaped headlights.^[4] The targa-style roof used four removable roof panels that could store beneath the flat-folding rear window.^[4]

The Fiftie was fully roadworthy, sharing most of the Renault Sport Spider's chassis, suspension, and mechanics as well as Renault's D7F 1.2-liter, 8-valve four-cylinder engine, which was subsequently introduced as a production engine in the Twingo.

After introducing the Fiftie, Renault chose not to develop the concept further.