The Aerodynamics of the Saab Automobiles

Posted on 01. Apr, 2007 by in 1940-1949, 1950-1959, 1960-1969, 1970-1979, 1980-1989, 1990-1999, 2000-2009, 9-3 SS, 92, 97 (Sonett II & III)

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Source: Johnson, Cutnell PHYSICS: Fifth Edition Wiley, New York, NY 2001

A colleague recently mentioned that there is a website that showcases the Saab Automobile’s drag coefficients of various Saab models throughout the years including the current 9-3 model.

I have decided to provide this information to you here, properly citing the source but before I do that I should provide some information about the drag coefficient and how it is broken down.

Drag coefficient (Cd) defined:A dimensionless quantity that describes a characteristic amount of aerodynamic drag caused by fluid flow, used in the drag equation

According to the source, a drag coefficient (Cd) equal to 1, is when all fluid is that approaches an object is “brought to rest”. This is why drag coefficients are less than 1 in automobiles today where the fluid (air movement) is spread across the vehicle with very little air “resting” in any one place for a sustained period of time. If there was a force of air movement sustained on all parts of an automobile the coefficient would be equal to 1.

Source: Drag Coefficient

Here are some of the drag coefficients for the Saab Automobiles from source. If someone has additional data for more of Saab’s models that I have not been able to find, it would be interesting to see a complete year over year and model vs. model comparison of drag coefficients.

– Ursaab 92001 (1946-1947)

0.32 – Saab 92, (1949 – 1956)

– Saab 93 (1956 – 1959)

– Saab 94 (1956)

– Saab 95 (1959-1978)

– Saab 96 (1960-1980)

– Saab 97 (Sonett II 1966-1967)

0.320 – Saab 97 (Sonett V4 1968-1969)

0.31 – Saab 97 Sonett III, (1970-1974)

0.37 – Saab 99 (1967-1984)

– Saab 90 (1984-1987)

0.34 – Saab 900 (1979-1993)

0.40 – 0.42 – Saab 900 GLI (1979-1984)

0.340 – Saab 9000CC (1985-1992)

– Saab 9000CD (1988-1993)

– Saab 9000CS (1993-1998)

0.34 – Saab 900 NG (1994-1998)

0.30 – Saab 9-3 (1999-2002)

0.34 – Saab 9-3 Convertible (1999-2002)

0.31 – Saab 9-3 (Viggen) (1999 – 2002)

0.33 – Saab 9-3 (Viggen Convertible) (2000 – 2002)

0.28 – Saab 9-3 SS (2003-
0.33 – Saab 9-3 SC (2005 –
0.34 – Saab 9-3 CVT(2004 –

0.29 – Saab 9-5 (1998 – 2005)
0.31 – Saab 9-5 Wagon/ SportCombi (2000-2005)

0.29 – Saab 9-5 (2006 –
0.31 – Saab 9-5 Wagon/ SportCombi (2006-

0.395 – Saab 9-7x (2005-

.35 – Saab 9-2x Linear (2005-2006)
.34 – Saab 9-2x Aero (2005-2006)

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4 Responses to “The Aerodynamics of the Saab Automobiles”

  1. Thyl engelhardt

    25. Mar, 2010

    Can the value for the 9-3 I (0.3) be correct? It looks almost identical to the NG900, that is stated to have a cd of 0.34. Where is that information from?

    Reply to this comment
  2. M Terry

    06. Mar, 2011

    Has any testing been done on 9-5’s with factory spoilers? Their design more resembles a reversed spinnaker than a sail.

    M

    Reply to this comment
  3. Hugh

    16. Jul, 2012

    Saab 9000 Cs Cd was 0.32, the last 9-3’s built had a Cd of 0.28 and the diesel version did an impressive 70mpg extra urban (imperial gallons)

    Reply to this comment
  4. Karl

    05. Jun, 2013

    2000 to 2002 9-3 SE has all the same sheet metal as 900NG, but many improvements in plastic including bumpers, rockers, rear center brake light, rear spoiler, and some front underbody bits. Non SE models lacked rockers, and bottom trim on the bumpers. I think the SE would be near the Viggen Cd.

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