A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

A4 drag coefficient?

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Old Feb 15, 2000 | 06:16 PM
  #1  
Ross
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Default A4 drag coefficient?

Hello,

Does anybody know the drag coefficient and the area displaced by the A4 or any other Audi models?

I teach a programming course at Embry-Riddle, and I'm having my students work on a project where they have to write a function to compute the drag force of an automobile given the drag coefficient and the area (and a few other important constants).

I haven't been able to find the drag coefficient on the audiusa web page or here, so I thought I'd through the question out here. Thanks.

--Ross<ul><li><a href="http://students.db.erau.edu/~mangesr">http://students.db.erau.edu/~mangesr</a</li></ul>
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Old Feb 15, 2000 | 06:20 PM
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Ross
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oops, found CD=0.29, but still need area, thx (nt)
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Old Feb 16, 2000 | 09:52 AM
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LCP
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It's either 21.8 or 22.8 sq. ft. -- from my S4 spec sheet at home (sorry can't remember which)
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Old Feb 16, 2000 | 09:54 AM
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LCP
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Default And are you certain about the 0.29, it is 0.31 for an S4...

...and I doubt 20mm of tire width and a different front bumper really accounts for that much difference.
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Old Feb 16, 2000 | 07:40 PM
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LCP
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It's 21.8
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