List of automobile drag coefficients
List of drag coefficients and drag areas for automobiles
From Wikipedia, the free encyclopedia
This is a list of automobile drag coefficients (Cd) and drag areas (CdA) for production, limited-production, and concept or experimental vehicles. The drag coefficient is a dimensionless measure of aerodynamic resistance used in automotive design; a lower value indicates a more streamlined vehicle that passes through the air with less resistance. The drag area (CdA) is the product of the drag coefficient and the vehicle's frontal reference area, and represents the total aerodynamic drag force per unit of dynamic pressure — making it a more complete measure of real-world aerodynamic performance than the drag coefficient alone.
Entries are grouped first by drag coefficient and then by drag area. Within each grouping, production vehicles and concept or experimental vehicles are listed separately. Unless otherwise noted, figures given are for the base model of a vehicle in a standard configuration. Measurements can vary by up to 5% depending on the wind tunnel and test methodology used.[1]
Drag coefficients
The average modern automobile achieves a drag coefficient of between 0.25 and 0.3. Sport utility vehicles (SUVs), with their typically boxy shapes, typically achieve a Cd=0.35–0.45. The drag coefficient of a vehicle is affected by the shape of body of the vehicle. Various other characteristics affect the coefficient of drag as well, and are taken into account in these examples. Some sports cars have a surprisingly high drag coefficient (such as the Ariel Atom at 0.40), but this is to compensate for the amount of lift the vehicle generates, while others use aerodynamics to their advantage to gain speed and as a result have much lower drag coefficients.
Some examples of Cd follow. Figures given are generally for the basic model, which may not be available in some markets. Some "high performance" models may actually have higher drag, due to wider tires, extra spoilers and larger cooling systems as many basic/low power models have half size radiators with the remaining area blanked off to reduce cooling and engine bay drag.
The Cd of a given vehicle will vary depending on which wind tunnel it is measured in. Variations of up to 5% have been documented[2] and variations in test technique and analysis can also make a difference. So if the same vehicle with a drag coefficient of Cd=0.30 was measured in a different tunnel it could be anywhere from Cd=0.285 to Cd=0.315.
Production cars
Concept and experimental cars
| Cd | Automobile | Calendar Year |
|---|---|---|
| 0.29 | FSM Beskid Polish hatchback prototype | 1983 |
| 0.27 | Avion[226] | 1986 |
| 0.26 | Alfa Romeo Disco Volante | 1952 |
| 0.25 | BMW Kamm-Coupé | 1938[227] |
| 0.25 | Dymaxion Car | 1933 |
| 0.25 | SmILE (an experimental car) | 1996 |
| 0.23 | Volvo ECC | 1992[228] |
| 0.23 | Pininfarina X (Morelli shape) | 1960[229] |
| 0.22 | BMW Vision EfficientDynamics Concept | 2009 |
| 0.22 | Citroën ECO 2000 Concept | 1981[230] |
| 0.22 | Aurel Persu Streamliner | 1923[231] |
| 0.20 | Opel Eco-Speedster | 2002[232] |
| 0.20 | Loremo Concept | 2006 |
| 0.19 | Alfa Romeo B.A.T. 7 Concept | 1954[233] |
| 0.19 | Dodge Intrepid ESX Concept | 1995 |
| 0.19 | General Motors Ultralite | 1992 |
| 0.19 | Mercedes-Benz Bionic Concept[234] (based on the boxfish) | 2005 |
| 0.170 | Chrysler Ghia Dart | 1955[235] |
| 0.170 | Mercedes-Benz Vision EQXX | 2022 (Cd figure measured in the Daimler aero-acoustic wind tunnel at a wind speed of 140 km/h)[236] |
| 0.168 | Daihatsu UFE-III Concept | 2005[237] |
| 0.16 | General Motors Precept Concept (5 seats)[238] | 2000 |
| 0.16 | Edison2 Very Light Car, Automotive X Prize winner[239] | 2010 |
| 0.159 | Volkswagen 1-litre car Concept | 2002 |
| 0.157 | Li-ion Motors Wave II, Automotive X Prize winner[240] | 2010 |
| 0.15 | Schlörwagen[241] | 1939 |
| 0.15 | Aptera 2 Series 2e Prototype | 2011 |
| 0.15 | Keris RV Nakoela Team (Shell Eco-marathon) Prototype | 2015 |
| 0.149–0.150 | Urbee 2[242] | 2013 |
| 0.147 | JCB Dieselmax land speed record holder | 2006 |
| 0.14 | Fiat Turbina Concept[243] | 1954 |
| 0.137 | Ford Probe V Concept | 1985 |
| 0.13 | Aptera Sol Prototype | 2021[244] |
| 0.125 | Sunraycer, solar race car | 1987 |
| 0.12 | Reflex 1000, solar cycle | 1996[245] |
| 0.12 | Panhard CD LM64 | 1964 |
| 0.117 | Summers Brothers Goldenrod Bonneville race car | 1965 |
| 0.116 | TUT Sunchaser 4[246] | 2022 |
| 0.095 | Sunswift 7[247] (Guinness World Record Holder,[248] World Solar Challenge Winner) | 2022 |
| 0.08 | Fortis Saxonia (Shell Eco-marathon) Concept | 2007 |
| 0.072 | Alérion Supermileage (Shell Eco-marathon) Prototype | 2013 |
| 0.07 | Nuna, World Solar Challenge winner | 2001–2007 |
| 0.0512 | Ecorunner V (Shell Eco-marathon) Prototype | 2015[249] |
| 0.048 | Ecorunner VI (Shell Eco-marathon) Prototype | 2016 |
| 0.045 | Ecorunner 8 (Shell Eco-marathon) Prototype | 2018 |
Drag areas
The drag area (CdA) is the product of the drag coefficient (Cd) and the vehicle's frontal reference area. It provides a single value that directly determines the aerodynamic drag force at a given speed, making it a more complete basis for comparison than Cd alone. In 2003, Car and Driver magazine adopted this metric as a more intuitive way to compare the aerodynamic efficiency of various automobiles. Average full-size passenger cars have a drag area of roughly 8 sq ft (0.74 m2). Reported drag areas range from the 1999 Honda Insight at 5.1 sq ft (0.47 m2) to the 2003 Hummer H2 at 26.5 sq ft (2.46 m2). The drag area of a bicycle (and rider) is also in the range of 6.5–7.5 sq ft (0.60–0.70 m2).[250]
Production cars
| CdA sqft | CdA m2 | Automobile model |
|---|---|---|
| 5.2 sq ft | 0.48 m2 | 2019 Mercedes-Benz A 180 d (V177)[252][c] |
| 5.3 sq ft | 0.49 m2 | 2013 Mercedes-Benz CLA 180 BlueEfficiency[253][c] |
| 5.4 sq ft | 0.50 m2 | 1989 Opel Calibra (8 valve) |
| 5.5 sq ft | 0.51 m2 | 2015 Audi A4 2.0 TDI ultra (110 kW)[196][c] |
| 5.52 sq ft | 0.513 m2 | 2019 Porsche Taycan Turbo[202] |
| 5.6 sq ft | 0.52 m2 | 2017 BMW 520d EfficientDynamics[254][c] |
| 5.6 sq ft | 0.52 m2 | 1993 Mazda RX-7 FD (base model)[255] |
| 5.70 sq ft | 0.530 m2 | 1985 Subaru Alcyone/XT/Vortex |
| 5.71 sq ft | 0.530 m2 | 1990 Honda CR-X Si |
| 5.74 sq ft | 0.533 m2 | 2002 Acura NSX |
| 5.76 sq ft | 0.535 m2 | 1968 Toyota 2000GT |
| 5.80 sq ft | 0.539 m2 | 1986 Toyota MR2 |
| 5.81 sq ft | 0.540 m2 | 1989 Mitsubishi Eclipse GSX |
| 5.86 sq ft | 0.544 m2 | 2001 Audi A2 1.2 TDI 3L |
| 5.88 sq ft | 0.546 m2 | 1990 Nissan 240SX / 200SX / 180SX |
| 5.90 sq ft | 0.548 m2 | 1992 Mazda Xedos 6[256] |
| 5.90 sq ft | 0.548 m2 | 2015 BMW i8[166] |
| 5.92 sq ft | 0.550 m2 | 1994 Porsche 911 Speedster |
| 5.95 sq ft | 0.553 m2 | 1990 Mazda RX7 |
| 5.96 sq ft | 0.554 m2 | 1993 Mazda RX-7 FD R1(R2)[255] |
| 6.0 sq ft | 0.56 m2 | 2001 Honda Insight[178] |
| 6.00 sq ft | 0.557 m2 | 1992 Subaru SVX |
| 6.00 sq ft | 0.557 m2 | 1970 Lamborghini Miura |
| 6.05 sq ft | 0.562 m2 | 2012 Tesla Model S P85[178] |
| 6.08 sq ft | 0.565 m2 | 2008 Nissan GTR |
| 6.08 sq ft | 0.565 m2 | 1989 Geo Metro[24] |
| 6.13 sq ft | 0.569 m2 | 1991 Acura NSX |
| 6.17 sq ft | 0.573 m2 | 1995 Lamborghini Diablo |
| 6.19 sq ft | 0.575 m2 | 1981 Citroën GSA X3[49] |
| 6.20 sq ft | 0.576 m2 | 2014 Toyota Prius[178] |
| 6.24 sq ft | 0.580 m2 | 2004 Toyota Prius |
| 6.27 sq ft | 0.583 m2 | 1986 Porsche 911 Carrera |
| 6.27 sq ft | 0.583 m2 | 1992 Chevrolet Corvette |
| 6.35 sq ft | 0.590 m2 | 1999 Lotus Elise |
| 6.37 sq ft | 0.592 m2 | 2000 Vauxhall VX220 N/A |
| 6.40 sq ft | 0.595 m2 | 1990 Lotus Esprit |
| 6.41 sq ft | 0.596 m2 | 2003 Smart Roadster Coupé |
| 6.54 sq ft | 0.608 m2 | 1991 Saturn Sports Coupe |
| 6.57 sq ft | 0.610 m2 | 1985 Chevrolet Corvette |
| 6.63 sq ft | 0.616 m2 | 2001 Audi A2 |
| 6.66 sq ft | 0.619 m2 | 1996 Citroën Saxo |
| 6.70 sq ft | 0.622 m2 | 2014 Chevrolet Volt[178] |
| 6.77 sq ft | 0.629 m2 | 1995 BMW M3 |
| 6.79 sq ft | 0.631 m2 | 1993 Toyota Corolla DX |
| 6.80 sq ft | 0.632 m2 | 2007 BMW 335i Coupe |
| 6.81 sq ft | 0.633 m2 | 1991 Subaru Legacy |
| 6.89 sq ft | 0.640 m2[257] | 2019 Renault Clio V |
| 6.90 sq ft | 0.641 m2 | 1993 Saturn Wagon |
| 6.93 sq ft | 0.644 m2 | 1982 DMC DeLorean |
| 6.94 sq ft | 0.645 m2 | 2003 Smart Roadster |
| 6.96 sq ft | 0.647 m2 | 1988 Porsche 944 S |
| 7.00 sq ft | 0.650 m2 | 2013 Mercedes-Benz CLA250[178] |
| 7.02 sq ft | 0.652 m2 | 1992 BMW 325I |
| 7.04 sq ft | 0.654 m2 | 1991 Honda Civic EX |
| 7.06 sq ft | 0.656 m2 | 2004 Vauxhall VX220 Turbo |
| 7.10 sq ft | 0.660 m2 | 1995 Saab 900 |
| 7.11 sq ft | 0.661 m2 | 1991 Ford Thunderbird LX |
| 7.13 sq ft | 0.662 m2 | 1970 Citroën SM[49] |
| 7.14 sq ft | 0.663 m2 | 1995 Subaru Legacy L |
| 7.20 sq ft | 0.669 m2 | 1995 Nissan Maxima GLE |
| 7.34 sq ft | 0.682 m2 | 2001 Honda Civic |
| 7.39 sq ft | 0.687 m2 | 1994 Honda Accord EX |
| 7.4 sq ft | 0.69 m2 | 2018 BMW X1 sDrive18i[258][c] |
| 7.48 sq ft | 0.695 m2 | 1993 Chevrolet Camaro Z28 |
| 7.57 sq ft | 0.703 m2 | 1992 Toyota Camry |
| 7.63 sq ft | 0.709 m2 | 1974 Citroën CX[49] |
| 7.69 sq ft | 0.714 m2 | 1994 Chrysler LHS |
| 7.72 sq ft | 0.717 m2 | 1993 Subaru Impreza |
| 7.80 sq ft | 0.725 m2 | 2012 Nissan Leaf SL[178] |
| 8.02 sq ft | 0.745 m2 | 2005 Bugatti Veyron |
| 8.1 sq ft | 0.75 m2 | 2016 Renault Zoe[259] |
| 8.70 sq ft | 0.808 m2 | 1990 Volvo 740 Turbo |
| 8.70 sq ft | 0.808 m2 | 1992 Ford Crown Victoria |
| 8.71 sq ft | 0.809 m2 | 1991 Buick LeSabre Limited |
| 8.79 sq ft | 0.817 m2 | 1956 Citroën DS Spécial[49] |
| 9.54 sq ft | 0.886 m2 | 1992 Chevrolet Caprice Wagon |
| 9.6 sq ft | 0.89 m2 | 2010 Chrysler PT Cruiser |
| 9.95 sq ft | 0.924 m2 | 2016 Chrysler Pacifica[260] |
| 10.7 sq ft | 0.99 m2 | 1992 Chevrolet Blazer |
| 11.6 sq ft | 1.08 m2 | 2005 Ford Escape Hybrid |
| 11.7 sq ft | 1.09 m2 | 1993 Jeep Grand Cherokee |
| 12.2 sq ft | 1.13 m2 | 1949 Nash Airflyte |
| 13.0 sq ft | 1.21 m2 | 2019 Ram 1500[261] |
| 13.1 sq ft | 1.22 m2 | 2021 Jeep Wagoneer (WS)[262] |
| 16.8 sq ft | 1.56 m2 | 2006 Hummer H3 |
| 17 sq ft | 1.6 m2 | 2013 Mercedes-Benz G-Class[263] |
| 17.4 sq ft | 1.62 m2 | 1995 Land Rover Discovery |
| 26.5 sq ft | 2.46 m2 | 2003 Hummer H2 |
Limited production cars
| CdA sqft | CdA m2 | Automobile model |
|---|---|---|
| 3.00 sq ft | 0.279 m2 | 2011 Volkswagen XL1 |
| 3.95 sq ft | 0.367 m2 | 1996 GM EV1 |
Concept and experimental cars
| CdA sqft | CdA m2 | Automobile model |
|---|---|---|
| 0.21 sq ft | 0.020 m2 | Pac-car II[264] |
| 2.04 sq ft | 0.190 m2 | 2011 Aptera 2 Series[265] |
| 2.10 sq ft | 0.195 m2 | 2013 Urbee 2[266] |
| 2.50 sq ft | 0.232 m2 | 1986 Twike[267] |
| 2.54 sq ft | 0.236 m2 | 2002 Opel Eco-Speedster[268] |
| 2.69 sq ft | 0.250 m2 | 2009 Loremo |
| 2.78 sq ft | 0.258 m2 | 2010 Edison2 Very Light Car[269] |
| 3.27 sq ft | 0.304 m2 | 1987 Renault VESTA II[270] |
| 4.72 sq ft | 0.439 m2 | 2014 Volkswagen XL Sport[271] |
| 5.00 sq ft | 0.465 m2 | 2005 Mercedes-Benz Bionic[272] |