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specific fuel consumption

ajmackie Nov 10, 2004

  1. ajmackie

    ajmackie Member

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    where can you get the specific fuel consumption diagrams? I have a '99 1.8 A4 with the ADR engine. Just want to know at what revs it is most economical.
     
  2. audi5e

    audi5e Member

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    It is normally close to your torque peak, since your engine is working at it's most efficient at that point. Or at least that is how I have always understood it. I am sure I have some old car magazines lying around, will see if I can find specifics.
     
  3. ajmackie

    ajmackie Member

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    just trying to drive economically!! petrol costs too much!!!! cheers
     
  4. audi5e

    audi5e Member

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    like driving like an angel for most of the tank, thinking you have achieved such a good consumption for the tank, and then being caught in some horrendous traffic jam, which blows your consumption figures straight to you know where.
     
  5. ajmackie

    ajmackie Member

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    yeah, lol! I did a lab in university on a ford 1.6 petrol against a water brake to plot out the engine characteristics. just thinking that if i cruise around in 5th at 30mph, then my engine might not be bruning fuel efficiently at those revs. But then would there still be minimal fuel used as no need for peak torque?
     
  6. audi5e

    audi5e Member

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    that is exactly the problem, so many factors. Here we have heat and altitude to contend with in addition to everything else.

    In my mind keeping the car revving as low as possible without straining the engine is the best way to save fuel. if you are travelling on the motor way, then rather keep the car at torque peak.
     

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