MPG

[Grant Lenahan]

Weight - absolutely  F still = MA
Driving style - sometimes, and rarely when on the highway
Engine size - very relevant - defines effective  compression ratio,  
pumping losses, and combustion efficiency, assuming some small power  
is required to maintain a body in motion at say 70 mph

Counter intuitively (unless you think like carnot or otto), a driver  
who accelerates foot to floor, and then cruises at maximum vacuum to  
maintain speed, will do better than one who accelerates slowly and  
then maintains the same speed.

Grant

On Nov 20, 2009, at 10:57 AM, Louis-Alain Richard wrote:

> Kent,
>
> I bet all these cars are about the same weight.
>
> Fuel consumption is closely related to weight and driving style  
> more than
> engine size.
>
> Louis-Alain
>
>
>
> -----Message d'origine-----
> De : quattro-bounces at audifans.com [mailto:quattro- 
> bounces at audifans.com] De
> la part de Kent McLean
> Envoyé : 19 novembre 2009 16:55
> À : quattro at audifans.com
> Objet : Re: MPG
>
> victor norman wrote:
>> I have a 2000 A4 2.8 quattro and never seem to get more than 20mpg in
>> mixed town and highway driving.
>
> I get in the low 20s (22-23), but that's without a lot of stop-and-go
> traffic
> slowing me down.  That's about the same as I get with the 20V and  
> the V8. Go
> figure.
>
> -- 
> Kent McLean
> 1990 V8 w/5-speed and other mods
> 1991 200 TQA #3, with mods
> 1999 A4 Avant, V6 Tiptronic
> gone: '91 200 TQA x2, '94 100 S Avant, '89 200 TQ "Bad Puppy"
>
> _______________________________________________
> quattro mailing list
> http://www.audifans.com/mailman/listinfo/quattro
> http://www.audifans.com/kb/List_information
>



Grant Lenahan
glenahan at vfemail.net
(201) 602-4702 mobile