The early Aptera was very high up -- and they would not be stable enough for real driving conditions. They lowered them for a very good reason -- not flipping over.
I think the Mercedes Bionic/Boxfish model could be made into a working car an keep the Cd down at a record low level, for a practical, road going car; if it was an EV. If it has an ICE drive, or even a hybrid drive, it jumps to more or less where the final Bionic car was. Which says something that it matched the EV1, which has a fraction of the cooling needs that the diesel powered Bionic has.
I think the Mercedes B/B design is something very special (unique?) -- it doesn't look like any other uber-low drag car, and it has a far more practical, usable, human-friendly interior shape, and even though it is "just" a Kamm back, it beats all comers, so far.
Nothing ordinary or conventional about it.
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