Renault 4 - Structure and Running Gear

Structure and Running Gear

The three principal new models introduced by Renault since the war had all featured monocoque "chassisless" construction which was believed to save cost in the manufacturing process and to cut running costs by reducing vehicle weight. The Renault R3/R4 design defied this by now widely accepted mantra, employing a separate platform to which the body shell was then attached. The body's structural role in maintaining the overall rigidity of the car body was thereby reduced, placing less stress on the roof and allowing for thinner window pillars. Although the use made of a separate platform resembled, in some respects, the use that pre-war designs would have made of a chassis, the outcome was a structure described as semi-monocoque, and it would later allow Renault to use the R4 platform, with very little modification, to build new models such as the Renault 6 and Rodeo. (Later, the successful Renault 5 used the R4 running gear but in a monocoque shell).