In June 1940, Louis Renault appointed Fernand Picard, who became deputy technical director in the automobile engine department.

These differences were carried out by changing the cylinder bore diameter[2] Commercialized in 1947 with the Renault 4CV, the first version of the "engine Billancourt" was a 0.8 L (760 cc) of 17 hp (13 kW) SAE.

This change was decided by the leaders of Renault in order to be able to use this extremely undersquare engine in competitions where it was necessary to stay below 0.8 L (750 cc) to homologate the car in its category.

The fourth and final version developed 38 hp (28 kW) maximum power and 57 N⋅m (42 lbf⋅ft) torque at 2,500 rpm.

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.

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 32 mm (1.26 in) Solex carburettor.

This engine made its debut in the fall of 1957, then, in 1959, it underwent further modifications and its power was increased to 40 hp (29 kW) SAE.

The first modifications made by Amedée Gordini (cylinder head with vertical outlet) will not however be kept on the model of series for reasons of cost.

Then came a much more powerful version, obtained by a new camshaft, new valves, a 32 mm (1.26 in) Solex double body carburettor, and by increasing the compression ratio to 9.2:1. bringing the maximum power to 55 hp (40 kW) SAE, 49 hp (36 kW) DIN.

It used pistons with convex heads (compression ratio increased to 9.2:1), a reversed Solex twin-choke carburetor type 32 PAIA 3, a special camshaft, double valve springs and Autobleu intake manifolds and exhaust.

The original braking system was improved by the addition of cooling fins on the perimeter of the front drums.

The suspension was that of the Dauphine type "bad roads" but with shorter springs without lowering the ground clearance.

The 1093 was the only Dauphine to have been marketed in France with 12-volt electrical equipment similar to the export versions instead of the original 6 volts.

Externally, the 1093 was distinguished from the Dauphine Gordini by its large-diameter 180 mm (7.1 in) headlights borrowed from the US version, its body white cream "Réjane" having two blue strips glued in the axis of the vehicle and "1093" badging to the right rear as well as the right front wing.

The preparation consisted of modifying and polishing the existing mechanics because the new sports regulations in force as early as 1960 prohibited any increase in displacement as well as changes of parts.