CITROËN SM (1970-1975)
he SM was in development for nine years, and at the start it was simply a project to produce a faster, more sports-orientated version of the DS. Then it became an entirely new, re-engineered car that would be launched as an expensive, low-volume grand tourer and underpin a mooted DS successor. This then became tied up with Citroën’s purchase of Maserati to obtain a suitable engine and, finally, the SM was used as a testbed for technology that would