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Old 11-18-2011, 11:54 PM   #101 (permalink)
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Isuzu Imark 1987-89
Chevy Spectrum 1987-89
Cd = 0.38
H = 52
W = 63.6
FA = 18.60
CdA = 7.07

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Old 11-23-2011, 12:12 AM   #102 (permalink)
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I noticed the Ford Focus wasn't on the list.

The figures for the 2000 MY aka the First generation were well reported. Ford advertised them as:
Sedan:
cD: 0.31
Frontal Area(est): 21.97 sq.ft.

ZX3
cD: 0.36
Frontal Area(est): 21.97 sq.ft

Wagon:
cD: 0.30
Frontal Area(est): 22.24 sq.ft.

For the "second generation" 2008-2011. The sedan and coupe had the same frontal area and cD.
Second gen Focus 2008+
cD: 0.32
Frontal Area(est): 22.8 sq.ft.

The 3rd generation 2012+ I couldn't find an official cD for a specific model but I calculated the frontal area incase someone finds it.
Sedan/Hatchback:
cD: 0.295
Frontal Area(est): 24.17 sq.ft

Source: The older generations are on Cars.com or any other generic car info site. I got the 2012 cD from Ford media which doesn't specify which body style.
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Old 11-23-2011, 12:20 PM   #103 (permalink)
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Ford claims 0.308 Cd for its 1992 Probe. I assume it's the same for the entire generation, 88-92 (1G).
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Old 12-26-2011, 06:45 PM   #104 (permalink)
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It's worth noting that there is no standard that manufacturers must use to measure either Cd or frontal area. One rule of thumb, w x h x .81 is incorrect for most cars, (because it does not account for differences in roundness or degree of trapezoidal shape of the greenhouse). Many manufacturers use the actual frontal area of the car and its tires, and do not include any part of the air under the car. Mirrors are often, but not always, included.

In a wind tunnel, Cd cannot be measured directly. It is calculated from drag force (which is measured directly) and frontal area. If two manufacturers happened to make exactly the same car, but one uses mirrors in its frontal area, and the other does not, then the Cd values will be different.

The Prius was measured independently at .30 by a contractor to Chevy (IIRC) when the Volt was being developed. The Toyota number is .25, which I don't doubt. Pretty huge differences for the same car.

Wind tunnels can have either stationary floors or be moving floors, and calculations can be adjusted accordingly (or not). Even when adjusted, the effects are not easily and accurately transferred from one car to another, because the under-car flow effects different cars in different ways.
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Old 01-17-2012, 08:48 PM   #105 (permalink)
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rikku2 - '02 hyundai accent gs
90 day: 30.73 mpg (US)

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2005 kia rio cD
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Old 03-15-2012, 12:09 PM   #106 (permalink)
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Hyundai Genesis Coupe 2009-2012
Coefficient of drag: 0.32
Frontal area: 2.04 m^2 (or 22 ft^2)
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Old 03-30-2012, 06:02 PM   #107 (permalink)
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ZX - '97 Citroen ZX Monaco
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Over 2000 vehicles in xls, not sure if mentioned already, has also other aerostuff, mostly in french:
http://pierreg.grappin.free.fr/MRT/Aero.xls
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Old 07-05-2012, 05:26 PM   #108 (permalink)
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Quote:
Originally Posted by Ken Fry View Post
If two manufacturers happened to make exactly the same car, but one uses mirrors in its frontal area, and the other does not, then the Cd values will be different.
Just a small correction to avoid confusion. Although mirrors can raise a car's drag coefficient (Cd), simply omitting them from the frontal area number will not change this measure. Changing frontal area will, however, affect CdA, which is the drag coefficient multiplied by the frontal area.

Removing the mirrors from the car will change CdA and may change Cd, depending on how aerodynamic the mirrors are.

That is all!
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Old 07-10-2012, 11:13 PM   #109 (permalink)
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good list
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Old 12-24-2012, 06:34 PM   #110 (permalink)
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1980 Mercury Capri (Fox body), via sales brochure

0.48 Cd w/o rear deck spoiler
0.47 with rear deck spoiler

Curb weight- 2548 lbs.

4 speed manual transmission ratios
1st- 3.98:1
2nd- 2.14:1
3rd- 1.42:1
4th- 1.00:1

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