Quote:
Originally Posted by aerohead
In 2012, Coventry University was able to reduce the drag of VW/ Audi's A2, from Cd 0.288, to Cd 0.204, without adding a millimeter of length to the car ( however, Cd 0.204 required a mirror-delete ).
They employed the modifications you're considering, along with those mentioned by members.
This research has been the focus of a dedicated thread here at EcoModder if you can find it.
And it should be an easy online search.
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The mechanical efficiency of the GTI engine may not be as high as the lower performance Golf. Don't know.
And the tire width of the GTI, if wider than the non-GTI, could also be an aerodynamic liability.
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That said, even with an engine and tire width liability, it's highly probable that you could achieve your mpg target with extreme attention to details.
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Thanks, that is a great resource, I am surprised that on their A2, simply blocking off front vents had the biggest effect of any of their mods.