15: 1972 Citroën SM
The 1972 Citroën SM is a futuristic French sports coupe offered in the 1970s. Leno has owned his example for 35 years and is the second owner. The styling of the Citroën SM is perhaps the most striking thing about this car. Take one look at the front fascia and headlights, and you know you’re in for something unique (via Motor Trend).
This car was the first car with rain-sensing windshield wipers in addition to the lack of a brake pedal. Instead, there is a mushroom that you’ll apply pressure to to slow the car down. In every possible way, the Citroën SM is one of the most unique and underrated luxury coupes around.