Another thing we will need to see is a more reclined, sportscar seating type of arrangement. Which should not be a problem because a longer car will enable a lower drag coefficient.
Yep, there's some more useful info here, and here. Note that second diagram. While that says a bullet shape should eventually reach a point of diminishing returns for the length (at 5 times longer than it is wide), that is under the assumption there is a cylindrical projection behind the bullet nose, not a conical projection (which would make it more of a teardrop shape).
Mighty Mira 
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