The Citroen SM is a high-performance luxury coupe produced from 1970 through 1975. Citroen started working on the sports variant of the successful DS in 1961 under the name ‘Project S’. The project ran for several years and during that time, Citroen built a number of concepts and even purchased Maserati in 1968 in order to harness Maserati’s high-performance engine technology. In 1970, the idea of the high-performance DS variant evolved into a completely new and re-engineered car and in March that year, the Citroen SM was presented at the Geneva Motor Show. The luxury coupe was fitted with unusually small for the marque 2.7-litre V6 due to the post-World War II tax horsepower regulations. The V6 produced a power of 170PS, which allowed to reach 60mph in 8.5 seconds and a top speed of 140mph. The electronic fuel injection was implemented in 1972, and then the enlarged 3.0-litre motor in the following year increasing the power by additional 10PS. The vehicle was quite successful, it was placed third in the European Car Of the Year in 1971 and won the 1972 Motor Trend Car of the Year award in the U.S.