>>28598084
... But personally, I think Rover were taking more inspiration from the BMC 1800/2200 Pininfarina Aerodynamica (pic). Austin-Morris and Rover were both folded into British Leyland at the time this concept was released; and whilst Austin and Morris wanted to pursue the Marina, Allegro, and Princess (arguably in the case of the latter also somewhat influenced by pic), Rover perhaps recognised more the promise of the concept.

Incidentally, when you compare pic, released in 1967, to many 70s Citroens like the SM, you may also begin to see some similarities...