300 C Hemi vs 2002 Boxster S

[Darkhamr]

a quick look up shows the 300C hemi as 5.9 and 14.4 compared to an '02S at what 5.5 13.9 I think? Since his is an auto how good are you with the stick? LOL Could be close if you are not perfect.

[Bavarian Motorist]

This is comparing apples to bricks, and yes, the 300c is the brick.


Anyways, the higher hp car will generally always pull away at higher speeds. (110+)

Especially w/ a difference that large.



However, I am almost CERTAIN that his car is electronically governed and yours is not. Therefore, in a straight line race, stock for stock, you would eventually out-top his top speed and win


I'm not suggesting you try it, either!

[Slashmatt]

Originally Posted by Bavarian Motorist

Anyways, the higher hp car will generally always pull away at higher speeds. (110+)

Especially w/ a difference that large.

This is absolutely not the case. Horsepower is only part of the equation. Aerodynamics, however, dictates how much power is needed achieve higher speeds.

A Boxster has a much smaller frontal area and probably (though not definetely) a better coefficient of drag than the 300C.

This is why bullets are shaped like bullets and not like, well you know, bricks.

[Adam]

Originally Posted by Slashmatt

A Boxster has a much smaller frontal area and probably (though not definetely) a better coefficient of drag than the 300C.

This is why bullets are shaped like bullets and not like, well you know, bricks.

Exactly, areodynamics is just as much as a factor as hp especially at higher speeds. That has allowed me to show my tailights to higher horse cars.

[Bavarian Motorist]

Originally Posted by Slashmatt

This is absolutely not the case. Horsepower is only part of the equation. Aerodynamics, however, dictates how much power is needed achieve higher speeds.

A Boxster has a much smaller frontal area and probably (though not definetely) a better coefficient of drag than the 300C.

This is why bullets are shaped like bullets and not like, well you know, bricks.

Just about all newer cars will be able to fight the resistance until the 100s, so that isn't really as much of an issue until very, very high speeds.


Fact is: At highway speeds (75-115), the 300c should pull pretty hard on the Boxster S.

[Slashmatt]

Originally Posted by Bavarian Motorist

Just about all newer cars will be able to fight the resistance until the 100s, so that isn't really as much of an issue until very, very high speeds.


Fact is: At highway speeds (75-115), the 300c should pull pretty hard on the Boxster S.

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--

[Boxtaboy]

There's a lot of cars faster than the Boxster on a 0-60 or 1/4 mile run. Thing is, there's not many that I'd really want to own. He may be really hopped up about his new purchase and all, but at the end of the day, it's just a boring family sedan with a big engine. IMHO, how boring.

Tell him to take your car for a drive one day when the weather is nice out....tell him to press the button to see the top drop down to let the sun shine in....let him wind out the engine to full revs to hear the wonderful sound of the flat 6 and take some fun curves. Let him see all the people in boring family sedan cars at stoplights look over at him with smiling faces and looks of envy, and then tell him, "yeah...I bet you want to "take" my car...take my car HOME that is!" After that drive, betcha he wont' be so hopped up about his Chrysler anymore. Instead, he'll start coveting yours

[Slashmatt]

I couldn't give a flying you-know-what whether a 300C is "faster" than a Boxster S. Somehow, given the state of the world, I don't like it when people ignore facts for pre-conceptions.

[Chills]

Originally Posted by Boxtaboy

There's a lot of cars faster than the Boxster on a 0-60 or 1/4 mile run. Thing is, there's not many that I'd really want to own. He may be really hopped up about his new purchase and all, but at the end of the day, it's just a boring family sedan with a big engine. IMHO, how boring.

Tell him to take your car for a drive one day when the weather is nice out....tell him to press the button to see the top drop down to let the sun shine in....let him wind out the engine to full revs to hear the wonderful sound of the flat 6 and take some fun curves. Let him see all the people in boring family sedan cars at stoplights look over at him with smiling faces and looks of envy, and then tell him, "yeah...I bet you want to "take" my car...take my car HOME that is!" After that drive, betcha he wont' be so hopped up about his Chrysler anymore. Instead, he'll start coveting yours

Very well said. I couldn't agree more.

[Bavarian Motorist]

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--

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.

OK, you wanna get physics, lets get physics.

Hemi: Fk=rolling resistance, air resistance, vibration and loss of heat, gravity, and misc...

Box: Fk=rolling resistance, air resistance, vibration and loss of heat, gravity, and misc...

So, the 225's on the hemi will have a little less resistance than the boxsters wider tires (and probably stickier compound), air resistance will be more for the hemi, boxster is engineered better so im assuming the big v8 is inefficient, hemi weighs more, and the suspension is probably softer.

lets take generic percents to calculate:
Hemi=(.02)+(.3)+(.1)+(.4)+(.01)=.83
Box=(.025)+(.2)+(.08)+(.28)+(.01)=.595

So roughly a 23% difference and there is a 25% difference in power. So I dont know, im sure my numbers are crazy but I was trying to make it relative to each other. You can add on to that or change it.

[Adam]

Originally Posted by Darkhamr

a quick look up shows the 300C hemi as 5.9 and 14.4 compared to an '02S at what 5.5 13.9 I think? Since his is an auto how good are you with the stick? LOL Could be close if you are not perfect.

^ I totally agree. The non SRT 300C isn't exactly what I'd call a quick car. It's decent but a boxster S should handle it if the driver knows how to drive.