Citroen SM Injection
The Citroën SM (Série Maserati) represented one of the most ambitious grand touring cars ever created, combining French innovation with Italian performance. Following Citroën's acquisition of Maserati, the SM featured a Maserati-designed 2.7-liter V6 with DOHC heads and Bosch fuel injection producing 178 hp. This engine powered the front wheels through a five-speed transaxle, an unusual configuration for a performance car. The SM's true innovation lay in its advanced systems: hydropneumatic self-leveling suspension provided a magic carpet ride, variable-assistance power steering offered two turns lock-to-lock with a self-centering action, and streamlined aerodynamics achieved a 0.26 drag coefficient. The futuristic design by Robert Opron featured a fastback profile, covered rear wheels, and six headlights (four on US models). Inside, the aircraft-inspired cockpit placed instruments on rotating drums and featured a single-spoke steering wheel. The SM combined 140+ mph top speed with supreme comfort and handling that defied its front-heavy layout. Though complex and expensive to maintain, the SM influenced automotive design for decades and earned a place in the Museum of Modern Art's permanent collection.
The SM requires specialist knowledge and maintenance - do not purchase without access to an SM-expert mechanic. Verify the hydropneumatic system functions properly as repairs are complex and expensive. Check for rust in the unibody structure, particularly sills and front subframe. The Maserati V6 needs careful maintenance with regular valve adjustments. Electrical systems can be troublesome. Parts availability is limited but improving with specialist suppliers. Documentation and service history are crucial. Budget significantly for ongoing maintenance.
The SM was assembled at Citroën's factory in Paris with engines supplied by Maserati in Modena. The fuel-injected 'Injection' models are more desirable than earlier carbureted versions. US imports faced strict emissions regulations that reduced power. Production ended in 1975 following Citroën's financial troubles and separation from Maserati.