Drag could explain it. It goes up with the cube of the coefficient with
speed so even a slight difference in drag on the two coudl be fairly
major at highway speeds.
Marty
JOE GLOWICKI wrote:
>
> drag - the amuont of air both gc & r/t have to push.
>
> Jim Miller wrote:
> >
> > Lets compare apples to apples. I have a 99 R/T RC weighing 4200 and a 2001
> > Grand Cherokee limited 4.7V8 weighing 4000, both automatics because that is the
> > only way you can get it and limited slip rear ends. The GC is very responsive
> > but the R/T can beat it 2 lengths to 60 and 5 on the quarter mile. the GC is
> > stock and the R/T has headers. Now I own them both and the GC is fun to drive
> > and lots quieter and more comfortable but for sheer speed the R/T is better.
> > Both are 4X2 models also. At 60 mph on cruise with a/c on the R/T gets 18 mpg
> > and the GC gets 21. Now there is a difference.
> >
> > Jim in Waco.
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