[aerohead]

The good news is that all the cars depicted have very good body geometry as a starting point for enhancement.
It's merely a matter of rear elongation to add drag reduction.
An ultra-light,gap-less, integrated boat tail trailer or inflatable tail for out of town excursions,and the short,'practical' length for urban warfare.
I like 'em all.
If capitalism ever catches on in the U.S.A.,consumers may find themselves investing in automotive technology which actually has an R.O.I.,breakeven point,net gain compared to what they're driving now.
I pay only half-price for gasoline compared with some other 1/2-ton pickups on the road.
And that's from a Cd 0.44 starting point.Imagine starting from 0.30 or a bit less.