It looks like the Prius C's drag coefficient will suffer a little bit for the sake of rear headroom. We know how to fix that, but it will require adding some length to the car. Put another way, Toyota is building a car with the basic body shape of the CR-Z, not that of the first-gen Insight. The difference is whether the rake angle of the rear glass is optimized for aero at all costs, or allows for practical considerations.
We know the Prius C concept needs to have front and rear bumpers added on before production. The final car will be larger than the one pictured. Also, when you say "normalized for ground clearance", does this account for the fact that most concept cars have 1-3", and will ride 3-5" higher in production?
Anyway, thanks for the analysis.
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