Re: 2010 Prius same drag coefficient as original Insight
I think lenwardus is suggesting in his comment that the wheel splats (side panels) and under body panels on the original Insight (vintage Insight - first generation Insight) do not really affect aerodynamics so much since the new Prius can match the drag coefficient number without using wheel splats.
I tend to disagree... Time changes everything... Toyota had 10 years to come up with a different design that would match the drag coefficient as the original Insight. If Honda wanted to redesign the outer shell of the first generation Insight, I'm sure that they could change a few things here and there that could beat the original cd without using wheel splats.
But just like IamIan was saying, the cd is now the same but the frontal area of the Prius is much larger than the original Insight so it still would take more power to push the car through the air.
JoeCVT = Just your average CVT owner
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2004 CVT Red Insight (purchased May 2011)
Relocated outside temp sensor near mid engine
No other mods performed yet 
2003 CVT Blue Insight
Modified version of MIMA_L (with foot pedal)
Automatic warm air intake (all season)
Low Speed Auto Stop (LSAS)
ABS - IMA regen enabler (allows regen during ABS)
Relocated outside temp sensor near mid engine
Cooling fans powered by 12V Solar Panel
2001 MT Blue Insight (purchased Nov 2011)
Not registered yet
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