In 1911, Renault introduced the Type CG and it would continue until 1928 through several model designations. By the time it was retired, it was known as the Type NM, and was replaced by the 7.1-liter, straight eight Reinastella. When introduced, the Renault's 40 CV was powered by a 7541cc sidevalve six and rested on a 3743mm wheelbase and weighed 1750 KG as a chassis alone.
After World War I, the engine was enlarged to 9120cc and remained this way with its anachronistic rear-mounted radiator and coal-scuttle bonnet. By 1922, front-wheel brakes were standardized, at which time the hood line was straightened to fully conceal the radiator.
Prior to the War, Renault had participated vigorously in motor sports. Afterwards, the 40 CV was the sole competitor, winning the 1925 Monte Carlo Rally and setting records at Montlhery, with both closed and open models.
Throughout its production lifespan, the Renault 40 CV was sold in many variations which were known by two letter names such as the CG, ES, and JP. By Daniel Vaughan | Apr 2018