Thread: CdA list
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Old 11-09-2010, 02:28 AM   #86 (permalink)
Piwoslaw
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Join Date: Oct 2008
Location: Warsaw, Poland
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Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
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I added data for the following 75 cars:

Audi A3, A4, A6, A8
BMW Compact, 3-, 5-, 7-series
CitroŽn C8, Saxo, Xantia, XM, ZX
Chrysler Voyager
Daewoo Espero, Nexia
Fiat Bravo, Cinquecento, Punto, Ulysse
Ford Escort, Explorer II, Fiesta, Galaxy, Ka, Mondeo, Mondeo Turnier, Scorpio, Windstar I
Hyundai Accent
Jeep Cherokee, Grand Cherokee
Lancia Delta HPE
Lexus LS 400
Mazda 323 C, 626, Xedos 6, Xedos 9
Mercedes-Benz C-, E-, G-, S-, V-series
Mitsubishi Colt, Pajero
Nissan Almera, Micra, Patrol GR, Primera, Terrano II
Opel Astra, Astra Caravan, Corsa, Omega, Sintra, Vectra
Peugeot 106, 306, 406, 806
Renault Clio, Espace II, Espace III, Laguna, Megane, Twingo
Saab 9000 CS
Seat Cordoba, Ibiza, Toledo
äkoda Felicja, Octavia
Subaru Legacy
Toyota Camry, Carina
Volkswagen Caravelle, Golf, Golf Variant, Polo, Sharan, Vento
Volvo 850, 940

They are all listed in the back of Piechna's book. These are all vehicles available in Europe in the late 1990's (may differ from American versions, for example the European Mazda 626 has higher suspension). The drag coefficient, frontal area and CdA are given in the book, though the Cd is usually listed as a few numbers. The author told me that he found them in different sources. Since I didn't know which number is closest to being correct, I used Cd = CdA/A. This gave a few numbers that don't look right, like Cd=0.27 for a '90's BMW, Mercedes or VW. Use at your own risk. If anyone is willing to verify any of these, please do so.

Not only did I calculate each Cd from CdA and A, I also searched the Internet for the height and width of each vehicle, plus I painstakingly converted each and every number from metric to the old-fashioned, backward units called inches and square feet. Words cannot describe how strenuous and time consuming this was, but I was driven by the faith that the fruit of my hard work will be of help to fellow ecomodders. I do hope that this forum will finally open up to metric units. Please.

I will add that I asked the author, mr.Piechna, for his permission to publish this data in EcoModder's CdA list. He replied that the rights to the book are actually the publisher's property, but personally he has nothing against it.

I wrote to the publisher 13 months ago, but since he still hasn't replied, then I assume the he also has no objections.
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Piwoslaw's Peugeot 307sw modding thread

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