 For 1997, new standards pollution should be applied.Renault could have kept his Cléon-Fonte 1.2 on the Twingo and its Energy engine 1.2 on the Clio, applying changes to its engines, including equipping each multipoint injections, but rather than investing fees studies on two different engines and before the unexpected success of Twingo, it is preferable to opt for a new engine that could both be mounted on the Twingo as the Clio, hence the birth of the "D Engine".This new engine will be produced D7F1 kind Douvrin by the "Société Française de Mécanique".