Lotus 20

The Lotus 20 was a Formula Junior single-seater that Lotus built for the 1961 season as the successor to the Lotus 18. It had a spaceframe chassis with fibreglass bodywork, front double wishbone suspension and a rear layout in which a lower wishbone and a fixed-length driveshaft acting as the top link located each wheel. It was equipped as standard with the Cosworth Mk.IV engine and either a Renault Dauphine gearbox or a Volkswagen box modified by Hewland, and its Alfin drum brakes were soon replaced by front discs and inboard rear drums. Compared with the Lotus 18 it had a much smaller frontal area and a lower centre of gravity, because the driver sat almost lying down. The 20B added an anti-roll bar and inboard rear drums, and some ran Lotus Twin Cam engines in Formula Libre and the Tasman series. A 1962 car hangs in the Canadian Automotive Museum.