About the Citroen SM
Launched in 1970, the Citroen SM represented one of the most technologically advanced cars of its era. It featured a Maserati-designed 2.7-litre V6 engine (later 3.0-litre), self-levelling hydropneumatic suspension, variable-assist steering, and distinctive aerodynamic styling by Robert Opron. Only around 12,920 examples were built before production ended in 1975, making it a rare sight on UK roads today.
The SM won the 1972 Motor Trend Car of the Year award and remains highly regarded among collectors for its innovative engineering and unique driving experience. Most UK examples are left-hand drive, though some right-hand drive conversions exist. The complex hydraulic systems and specialist engine components mean ownership requires commitment and expertise.
What Affects the Price
Condition is everything with the SM. Restored cars with documented history and functioning hydraulics command top prices, while projects needing extensive work start around £4,500. The hydraulic system's health significantly impacts value, as repairs are costly and require specialist knowledge.
Originality matters to collectors, with matching numbers cars worth more than modified examples. Engine type affects value, with the later 3.0-litre models slightly more desirable. Mileage is less critical than condition and maintenance history, as most SMs have covered modest distances. Rust in the complex body structure can be expensive to repair, so solid bodywork adds considerable value.
Buying Tips
Inspect the hydraulic system thoroughly. The car should rise to full height within 10 seconds of starting, and the suspension spheres should provide a smooth, fluid ride. Check for leaks around pumps, accumulators, and brake components. Budget £2,000-£5,000 for a full hydraulic system rebuild if needed.
Examine the bodywork carefully for corrosion, particularly in the sills, front wings, and around the rear screen. Engine specialists for the Maserati V6 are limited in the UK, so verify the engine runs smoothly without oil leaks or unusual noises. Join the Citroen SM Club UK before buying for access to knowledge and parts sources. Factor in running costs of £2,000-£4,000 annually for maintained cars, more for restoration projects.