Cars Are Such a Drag
Some examples of drag coefficient found in the automobile industry throughout history and a few other objects for comparison.
2.10 - A smooth brick
0.90 - A typical bicycle plus cyclist
0.70 - A Formula 1 car
0.70 - Caterham Seven
0.60 - A typical truck
0.57 - Hummer H2, 2003
0.51 - Citron 2CV
0.42 - Lamborghini Countach, 1974
0.39 - Dodge Durango, 2004
0.38 - Volkswagen Beetle
0.38 - Mazda Miata, 1989
0.372 - Ferrari F50, 1996
0.36 - Citron DS, 1955
0.36 - Ferrari Testarossa, 1986
0.36 - Opel GT, 1969
0.36 - Citron CX, 1974
0.34 - Ford Sierra, 1982
0.34 - Ferrari F40, 1987
0.34 - Chevrolet Caprice, 1996
0.338 - Chevrolet Camaro, 1995
0.33 - Dodge Charger, 2006
0.33 - Audi A3, 2006
0.33 - Subaru Impreza WRX STi, 2004
0.32 - Toyota Celica, 2005
0.31 - Citron GSA, 1980
0.30 - Saab 92, 1947
0.30 - Audi 100, 1983
0.30 - Porsche 996, 1997
0.29 - Honda CRX HF 1988
0.29 - Subaru XT, 1985
0.29 - BMW 8 Series, 1989
0.29 - Porsche Boxster, 2005
0.29 - Chevrolet Corvette, 2005
0.29 - Honda Accord Hybrid, 2005
0.29 - Lotus Elite, 1958
0.28 - Toyota Camry and sister model Lexus ES, 2005
0.28 - Porsche 997, 2004
0.28 - Saab 9-3, 2003
0.27 - Rupler's Tropfenauto, 1921
0.27 - Infiniti G35, 2002 (0.26 with "aero package")
0.27 - Mercedes-Benz W203 C-Class Sedan, 2001 - 2007
0.26 - Toyota Prius, 2004
0.25 - Honda Insight, 1999
0.212 - Tatra T77, 1938
0.195 - General Motors EV1, 1996
0.19 - Mercedes-Benz "Bionic Car" Concept, 2005
0.137 - Ford Probe V prototype, 1985
0.15 - Volkswagen ARVW
0.06 - The boxfish
0.04 - A drop of water
To Change or Not to Change
When you modify your car in any way, you are changing the original design and the vehicle's overall characteristics. Sometimes that is a good thing, while other times it can lead to negative results. Below is a list of common modifications and their estimated change in percentage of the overall drag coefficient (Cd) of an average car. For example, the outside rearview mirrors add a two to four percent increase in the Cd. However, it should be noted that your results may vary.
|Lowering the vehicleby 30mm ||approx. -5|
|Smooth wheel covers||-1 to -3|
|Wide tires||+2 to +4|
|Windows flush with exterior||approx. -1|
|Sealing body gaps||-2 to -5|
|Underbody panels||-1 to -7|
|Concealed headlamps||+3 to +10|
|Outside rearview mirrors||+2 to +5|
|Airflow into the enginecompartment ||+4 to +14|
|Brake cooling devices||+2 to +5|
|Interior ventilation||approx. +1|
|Open windows||approx. +5|
|Open sunroof||approx. +2|
|Roof-mounted surfboard rack|
Aerodynamics Buyers Guide
The Wind Beneath Our Wings
The latest and greatest in aerodynamics from the world's best design houses
Conversations and theories about aerodynamics abound in the automotive industry, and if you wanted to throw puns around, you could say it is a lot of hot air passing over stiff resistance. Does a car go fast enough to warrant a full body kit? Is a spoiler or airdam necessary on American highways? Will I affect my car's performance enough to offset the cost of the variety of packages on the market today? These questions can be argued until your car becomes an antique, but the only solid answer with any kernel of truth that everyone can agree on is that most aerodynamic-themed accessories make your car look cool. Whether they improve handling, fuel economy, or 60-foot times are issues best left to physicists, engineers, and bench racers (unless, of course, you have the time slips to prove it).
Claus Ettensberger Corp.
(Direct importer for TechArt, Novitec, AC Schnitzer, Brabus, and Oettinger)
If you have a European car, chances are CEC has an aero package for it.
TechArt's GTS front spoiler for the 911 Turbo.
AC Schnizter's E90 front air dam.
AC Schnizter's E90 rear roof spoiler.
Brabus aerodynamics offer practical and functional solutions across the entire MBZ lineup. Brabus components directly replace the factory parts with a O.E.-style precision.
Brabus aerodynamics offer practical and functional solutions across the entire MBZ lineup.
TechArt's composite-built wing II.
Novitec's Ferrari 360 wing features two adjustment settings.
TechArt's very new Cayman aero kit replaces the front bumper.
Oettinger's Audi A3 aerodynamics include integrated foglamps, carbon-fiber lips and grille inserts.
Oettinger's Audi A3 aerodynamics include integrated foglamps, carbon-fiber lips and grille
Novitec's Ferrari 360 components are available in either reinforced fiberglass or carbon-fiber composite.
Novitec's Ferrari 360 components are available in either reinforced fiberglass or carbon-f