Evidence for an SM ... attached is the same picture but with better definition and with a Citroen SM interior to the side for comparison. Note the distinctive seat and features such as how the rear leather of the seat curves around to the side; the adjuster arm and the headrest shape. Also note the passenger door pull.
However there is a Lancia connection ... the person pictured is Alain Delon who by all accounts liked Lancias and campaigned a Stratos as well as doing various films involving Lancias (in seven films listed at
http://www.geocities.ws/cleanstream/lancia/onfilm/index.htm)