1976 Renault VBG Prototype by Robert Opron

The Renault VBG Prototype of 1976 was the first major project undertaken by Robert Opron after he was recruited by Renault from Citroën, where he had designed iconic cars like the GS, CX, and SM. The Véhicule Bas de Gamme (VBG) was intended as a new entry-level model to eventually replace both the Renault 4 and Renault 6, slotting beneath the Renault 5 in the brand’s lineup.

The VBG prototype showcased several forward-thinking design elements. Most distinctive were its sliding semi-circular side windows, a novel alternative to traditional glass that helped reduce cost and complexity. It also featured a front-hinged clamshell bonnet that integrated the front wings—a solution likely aimed at simplifying maintenance and production.

Although Opron's tenure at Renault ended before the VBG could reach production, the project survived into the 1980s. Under the guidance of Patrick Le Quément, the VBG’s ideas evolved into the first-generation Renault Twingo, launched in 1992—renowned for its space-efficient design, quirky character, and affordability. The 1976 prototype thus laid the groundwork for one of Renault’s most beloved small cars.