Corvette Action Center - The ultimate online hub of Corvette news and information! Click here to go to the Corvette Forums!


Supporting Vendors / Dealers - Supporting Membership - Advertising Information - Corvette Amazon Shop
Results 1 to 4 of 4
  1. #1
    82ColEd's Avatar
    Join Date
    Jul 2003
    Location
    Frankfurt/Germany
    Posts
    2,807
    Corvette(s)
    1982 Collector Edition

    Default Fuel Economy: 2wd vs. 4wd/awd

    Someone please help me to understand this one:

    I keep reading that AWD is worse for the fuel economy then 2WD. I am scratching my head on this one, as i cant figure out how that could be. The engine still has to move all 4 wheels, whether powered or not. I ran a comparison on the car i have that has the AWD (The Magnum) and the fuel economy is almost the same:

    (From http://www-5.dodge.com/vehsuite/VehicleCompare.jsp)

    R/T RWD
    City: 17
    Highway: 25

    R/T AWD
    City: 17
    Highway: 24


    (I picked the RT RWD vs the RT AWD to make it similar). So the AWD is 1 mpg off on highway mileage.. I keep reading magazines that are decrying the use of AWD if it's not needed (IE. dry roads, in the city etc).

    So engineers, riddle me this: Are those magazines just blowing hot air or do they have a point ?


    TIA!

    -Stefan

  2. #2

    Join Date
    Jan 2002
    Location
    Washington, Michigan
    Posts
    7,274
    Corvette(s)
    '67 Marina Blue Convertible

    Default

    The AWD system on the Magnum (and on the 300 and Charger) supplies 38% of engine torque to the front wheels at all times (and 62% to the rear); the 1-mpg reduction in highway fuel economy vs. RWD-only is probably related to a) The added weight of the AWD system (transfer case, differential, and axle shafts) and b) The parasitic/friction losses involved in turning all that AWD stuff full-time.


  3. #3
    82ColEd's Avatar
    Join Date
    Jul 2003
    Location
    Frankfurt/Germany
    Posts
    2,807
    Corvette(s)
    1982 Collector Edition

    Default

    Thanks John,
    that makes sense.. But then, with that said, there shouldnt be any case where it's really about fuel efficiency. Or are they just going after that 1mpg? Sorry, cant a link document to this, as it's in german.

    Just baffles me how someone can say that AWD is ruiing the fuel efficiency of a vehicle.

  4. #4

    Join Date
    Jan 2002
    Location
    Washington, Michigan
    Posts
    7,274
    Corvette(s)
    '67 Marina Blue Convertible

    Default

    Quote Originally Posted by 82ColEd View Post
    Thanks John,
    that makes sense.. But then, with that said, there shouldnt be any case where it's really about fuel efficiency. Or are they just going after that 1mpg? Sorry, cant a link document to this, as it's in german.

    Just baffles me how someone can say that AWD is ruiing the fuel efficiency of a vehicle.
    I wouldn't say it RUINS it, but it does reduce it slightly. However, if you look at it in a German context, they're paying about $6.00 - $7.00 a gallon, and fuel economy is a much more important consideration for them than it is for us.


Similar Threads

  1. fuel economy on 2006 C6's
    By hooligan in forum C6 General Discussion
    Replies: 18
    Last Post: 09-12-06, 01:24 PM
  2. Fuel Injector Cleaning Services
    By Ken in forum General Automotive Discussion
    Replies: 7
    Last Post: 09-26-05, 09:30 AM
  3. Acetone Improves Fuel Economy 35%?
    By Robert YellowVette in forum C5 Technical and Performance
    Replies: 18
    Last Post: 05-05-05, 10:23 PM
  4. MPG higher on the highway
    By Stallion in forum General Automotive Discussion
    Replies: 6
    Last Post: 05-30-04, 10:02 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© CORVETTE is a registered trademark of the General Motors Corporation & Chevrolet Motor Division.  Neither Chevrolet Motor Division nor any subsidiaries of GM© shall bear any responsibility for CorvetteActionCenter.com content, comments, or advertising. CorvetteActionCenter.com is independent from GM© and is not affiliated with, sponsored or supported by GM©.  Copyright/trademark/sales mark infringements are not intended, or implied.  All Rights Reserved