Rolf Buchheim et al. tested this half-body-inspired shape in the Volkswagen Climatic wind tunnel in 1981.
It achieved Cd 0.14 as shown and would have lower drag if fitted with wheel fairings.
If any of the contours are made more aggressive,we risk separation and higher drag.
Frontal area would decide how many occupants could fit inside.
Wolf Heinrich Hucho commented,in his 1986 book,"The attempt to design a car with an integrated 'ideal' body was repeated several times,but without production success.'
Individuals like us are free to explore these low drag forms as long as we respect all the associated regulations.
