1970 Citroen SM

The 1968 marriage of Citroën and Maserati led to the birth of a highly individualistic sports coupé. The SM took DS technology, threw in a Maserati V6 engine and finished it off with a brooding, angular body that was distinctively Citroën, but also looked very prestigious and expensive. Utterly original and technologically advanced, this idiosyncratic French supercar demanded careful care and developed a reputation for fragility which harmed sales. When Citroën was taken over by Peugeot in 1975 the SM was one of the first casualties.

Information from Octane Magazine.