with many of the 1093 Dauphine competitors who became "1093 Enhanced". Only 2,140 copies (plus an additional 8 pre-series cars) were produced in two series. The first consisted of 1,650 units for homologation purposes (1,500 copies minimum), with a second batch of 490 units, fitted with disc brakes and painted white gray "Valois", built to meet additional customer demand. The 1093 is the most sought after of all the Dauphines. Today, it is estimated that around a hundred of 1093 have survived, half of which are still rolling. In 1962, the Dauphine 1093 was seen at the Tour of Corsica Rally. However, its late launch and relatively modest performance improvements did not allow for a long sports career. The 1093 remains an engaging car that ensures the transition between the artisanal 4CV 1063 and the R8 Gordini that would revolutionize the car competition "tourism series". Succession In 1962, the Sierra engine, later renamed "Cléon-Fonte engine", appeared on the Renault Floride S and the Renault 8. It innovated with its five-bearing crankshaft. It was a medium-displacement engine, not replacing the Billancourt engine which remained to power lower-range models. Over the years, cars became heavier and more efficient, forcing Renault to abandon the Billancourt engine and, as a result, the Cléon-Fonte engine came to be considered a small-displacement engine by 1980, when the Billancourt engine disappeared. The Cléon-Fonte engine is not an evolution of the Billancourt engine but an entirely new engine designed by the engineer René Vuaillat. Both engines have a lateral camshaft and a chain or sprocket drive, and so a distant resemblance. Models equipped with this engine Renault 4CV Renault Dauphine and Ondine Renault Juvaquatre Renault Caravelle and Renault Floride Renault Estafette Renault 3 Renault 4 Renault 5 Renault 6 Alpine A106 Alpine A108 Different cylinder capacity References Billancourt Renault Billancourt engine Straight-four engines