equipped the Renault 4 from 1964 and the Renault 6 base model; in these front-engined, front-wheel drive applications the engine was codenamed 800. The bore was increased to . The power ranged between SAE for standard (non-Gordini) engines. The fourth and final version developed maximum power and torque at 2,500 rpm. This was made possible by machining the cylinder head, with new valves and valve seats, as well as improvements in engine cooling. It was fitted on the Renault 5L from 1977 to 1984. Later models were called B1B, reflecting Renault's new engine numbering system. 603 cc This was the cheapest Billancourt engine to produce. The bore was reduced to for a total displacement of . The maximum power reached SAE, DIN at 4,800 rpm, while the maximum torque was . This engine was mounted only on the Renault 3 (1961-1962), an ultra-Spartan version of The Renault 4. Ventoux Engine The "sport" version is called Ventoux engine, named after the Mont Ventoux Hill Climb. 747 cc Ventoux The sport variant of the engine, which equipped the Alpine A106 and the Renault 4 CV R1063, underwent major modifications which affected, among other things, the connecting rods (now more powerful and duralumin), the camshaft, the (larger) valves and the Solex carburetor. Significantly higher values were obtained, ranging from SAE nominal for a Renault 4 CV R1063 standard (up to SAE and more for the versions used in racing) to SAE for the engine used on the A106 (some were prepared at SAE). For this last application, the Solex twin-choke carburetor was preferred to a twin-choke Weber carburetor. Ventoux Gordini The more powerful versions were developed by Amédée Gordini from the original engine. The machining of the inclined valve seats allows for a greater range but leaving intact the camshaft spindle, improved cylinder head cooling, and the engine is fitted with a new Solex carburettor. This, in conjunction with the increase in compression ratio, results in a maximum power of SAE at 5,000 rpm with a maximum torque of at 3500 rpm. This engine made its debut in the fall of 1957, then, in 1959, it underwent further modifications and its power was increased to SAE. The "Sorcerer" then makes a small preparation, thus the Dauphine Gordini (type R1091) is born in 1957. The power of the block increases to SAE and the top speed to thanks to a new cylinder head, increased