I think that this is the Lange car which inspired the early Porsche sports cars,like the 60K10 which Ferdinand drove between Stuttgart and Berlin before the war.
To the Cd 0.14-16 featureless,smooth model,we'd have to add in all the features drag,interference drag,drag due to lift,cooling system drag,etc..
Also,if you look at the Lange car in plan view,it has extreme plan taper,nearly from the front of the car.Never done in the production cars.
The Volkhart Sagitta V2 is very similar to the Lange body.Cd 0.21.
