Above and below Robert Opron's 1966 styling sketches for the forthcoming SM
Above and below models of Opron's proposal
Right Giret's proposal for the dash featured a "Quartic" steering wheel not unlike that fitted to early BMC Allegros
Above, above right and right considerable importance was paid to aerodynamics and a one fifth scale model was tested in Citroën's wind tunnel.
Good aerodynamics were necessary if the car, equipped with a relatively small 2.7 litre engine (French tax rules penalised anything larger than 2.8 litres) were to have the 130 mph/210 kph plus performance demanded.
An SM mule was equipped with a 4 litre V8 Maserati engine which was intended for the Quattroporte.
Above another of Robert Opron's 1966 styling sketches
Above this sketch dates from 1968
Above and below designs by Messrs Gromik and Giret
Above the bodyshell is close to definitive but the nose treatment has not yet been finalised
