 Development was led by Matra's head of engineering and design Phillipe Guédon and Chrysler-Simca product planner Jacques Rousseau.Additional direction for the design was provided by Chrysler-Simca planner Marc Honoré.Honoré identified Simca's strongest market as being cars displacing between 1.3 and 1.5 litres and suggested the team focus on building a car of that class, which would constrain the size of the car if performance was to be acceptable.