A6 fuel mileage

[LL - NY]

The 89 200Q is a turbo 2.2 L I-5 with a 5 sp manual tranny. On part
throttle, it's going to be relatively fuel efficient. The C4
100CSQ/A6 is a 2.8 L 12V V6, which, especially when connected to the 4sp
slushbox is a much thirstier beast. Heck my C4 //S6 with 20V I-5 turbo 2.2 L
I-5 and 5 sp manual tranny AND an MRC Stage 2 chip tune to 280 HP or so is
capable of getting 26 or so MPG on highway trips of significantly shorter
distance than 600 miles (try 90 or so). It's the reason that many mfg's
turned to turbos in the mid-eighties, the part throttle fuel efficiency.
Comparing a turbo C3 to a V6 C4's fuel economy is about the same as
comparing apples and oranges. It's just not even comparable.

LL - NY


On 8/14/07, ckrug7380 at comcast.net <ckrug7380 at comcast.net> wrote:
>
> I recently made a one day, 600 mile, almost entirely interstate drive in
> my '89 200Q.  At the beginning of the trip, I filled up  the tank and reset
> the computer.  When finished, it read 29.0 mpg.    I do admit that it gets
> nowhere near this good in city driving, but I tend to use the boost a little
> more than I should.  I average about 18 around town.  Still,  not bad for an
> 18 year old, 300,000+ (I'm guessing, odo stopped at 250k a few years ago)
> mile car.     The first thing to check if you suspect the mileage isn't as
> good as it should be is ignition.  I was getting about 14mpg city, replaced
> the cap and rotor that were pitted pretty badly, found the #5 spark plug
> badly fouled, cleaned it and replaced the plug wire on that cylinder, and it
> jumped up 4 mpg overnight.  More boost now too.  Love it.
>
> Calvin K.
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