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Originally Posted by JulianEdgar
Sorry, but again I can't see the relevance to the discussion. If they make underfloor changes to the electric version (as you say they do) then obviously the Cd of that version will be lower, and so it doesn't tell us what proportion of total drag is made up by the EV cooling system on the EV car. This can only be found out by testing the cooling drag of each version and telling us what it is.
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They don't change the floor. The difference is only due to the front grill and the exhaust tunnel closed. Two parts that need cooling, more for thermal model
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Nearly all modern prestige cars use cooling shutters - BEV or ICE or Hybrid. It's nothing to do with the car being a BEV.
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They have. Because the cooling needed is lower for electric (See the e-up for example). So the shutter could be closed most often. If you want to compare the two drags, you need to know how often they will be closed.