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Originally Posted by Slashmatt
Okay, this is actually starting to annoy me. You are ignoring physics altogether. The chrysler is MUCH heavier
F = M * A (force = mass * acceleration). Therefore the 300 requires about 25% more force to accelerate at the same rate as the boxster.
The 300C has at least 30% larger aerodynamic cross section which means that the air is acting like a 360 lb weight on the 300C at 100MPH (given a reasonable drag coefficient) where the Boxster would be pushing about 240lb.
Now, if you're talking about the 425HP $50k SRT-8, yes, that car will pull on a Boxster S for a while. The standard Hemi just doesn't have that much in the way of performance.
--BTW: Member of Tau Beta Pi and Magna Cum Laude Engineering BS here--
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You can use your rough calculations and approximations all you want, but until you get out there and see it, your word is mere speculation. Especially considering how many varying factors you are leaving out.
My 2003 SL500 will pull far, far away from my Boxster at highway speeds. It weighs actually more than 4000 lbs and has less hp (302) & torque (339) than the 300c.
It is far more aerodynamically efficient, however.
Granted, my Boxster is less slightly less powerful than a 986 S, it is not illogical to think the results would be comparable.
If you don't believe me, you're welcome to come over and try it out.
EDIT: I don't think the 300c would demolish the Boxster S, but I think it would definitely be ahead in some of those upper speeds, that is of course, until it physically can't go any faster and the Boxster is still going.