ORIGINAL: topspeed
Right I was able to reduce the drad further when I tried to see how a flying car version of that low D car could look like.
The suspension could be like in Gumpert Apollo. It also seems to have almost no room to work for the suspension albeit it has 700 hp engine on it.
I am afraid that this car would produce a significant amount of lift. Lift equals drag and worse, it make it very unsafe at speed.
To design a car, you need to look at as a three dimensional object. Also, I don't know where you are getting your drag "number" but I don't believe it.