I think the passenger sits further forward than was speculated in the drawing. Which of course is an aerodynamic phenomenon. [/Sarcasm]
These dimensions are from Elio's site,
Elio Motors: Ultra High Mileage Car. (specs tab):
Headroom:
Driver 39.8
Passenger 36.4 in
Seat width:
Driver 20.6
Passenger 25.3 in
Interior Shoulder Width: 26.8 in
Front seat Legroom: 42.7 in
Rear seat Legroom: 33.1 in
Elio has been designed to fit 95% of all men. The tallest person we have had in the Elio is a 6’8″ former college basketball player, the largest is a 6’3″ 365 lb man, and the smallest is a 5’0″ woman (no, we didn’t ask the weight!).