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My thoughts would be that the 6-Speed would afford you better gas mileage only because in top gear the RPM's are so low when going 65 that the consumption would be less than the A4 Auto with over drive.
Again... just my opinion. I have driven both and feel like I have gotten better mileage in a Manual vs. an Auto.
Especially for the highway mileage. The 0.5 ratio 6th gear really keeps the rpm down and helps mileage on the 6 speeds.
For information the EPA mileage ratings for 2000 are:
Old rating method
6 speed 18/27 city/highway
Automatic 17/25 city/highway
New rating method
6 speed 16/25 city/highway
Automatic 15/23 city/highway
So the EPA rates the 6 speeds about 2 mpg better than the automatics.
The new method is way off I get a confirmed 31.5 over a 150 mile trip at just about 80 mph the entire time. But I do have longtubes, a little less weight and a 6 speed.
The new method is way off I get a confirmed 31.5 over a 150 mile trip at just about 80 mph the entire time. But I do have longtubes, a little less weight and a 6 speed.
I think the EPA numbers are low too (even the old method), but that is what they are.
I have gotten a best of 34.8 on a couple hundred mile trip (all highway with the cruise on at 71 mph). Mine is also a 6 speed with longtubes.
Last edited by QCVette; Aug 10, 2012 at 09:10 AM.
Reason: mph added and spelling
Final gear * last OD gear on the 6-speed yields lower RPM while cruising than the auto. Also, you lose a little power through the auto so you lose some efficiency.
I just got back from 3 weeks in the road in my '04 A4 with the 273 rear end. I got 31.6mpgs on the computer and 30.5 by the gas receipts. Myself, my wife and 132 pounds of gear onboard.
The trip varied a lot as to MPH and terrain. We left Montana and headed thru WY, SD, NB, MO, AR, OK, NM, AZ, UT, ID and back home. I pretty much drove the speed limit where ever I happened to be except when traffic was moving faster, such as thru Utah where the limit is mostly 80mph and I was usually doing about 88mph just to keep up.