Why the HP difference?
#1
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I was reviewing the specs for XK8's of 2005 and earlier and there is a 6 to 10 hp difference between European models and North American models and at least a .3 second 0-60 time difference. Why
Reference: 2005 Jaguar XK8 Convertible (X100) full range specs (6 hp)
Reference: http://www.automobile-catalog.com/ma...ible/2000.html (10 hp)
The reason I am asking is: Is it possible to add the HP back to the European models? An easy 6-10hp?
Reference: 2005 Jaguar XK8 Convertible (X100) full range specs (6 hp)
Reference: http://www.automobile-catalog.com/ma...ible/2000.html (10 hp)
The reason I am asking is: Is it possible to add the HP back to the European models? An easy 6-10hp?
Last edited by XCrossWindsX; 04-19-2015 at 11:36 PM.
#3
![Default](/forum/images/icons/icon1.gif)
I was reviewing the specs for XK8's of 2005 and earlier and there is a 6 to 10 hp difference between European models and North American models and at least a .3 second 0-60 time difference. Why
Reference: 2005 Jaguar XK8 Convertible (X100) full range specs (6 hp)
Reference: 2000 Jaguar XK8 Convertible (X100) full range specs (10 hp)
The reason I am asking is: Is it possible to add the HP back to the European models? An easy 6-10hp?
Reference: 2005 Jaguar XK8 Convertible (X100) full range specs (6 hp)
Reference: 2000 Jaguar XK8 Convertible (X100) full range specs (10 hp)
The reason I am asking is: Is it possible to add the HP back to the European models? An easy 6-10hp?
#4
![Default](/forum/images/icons/icon1.gif)
I thought about that but then why would the 0-60 / 1/4 mile times be different? Excuse my ignorance. All those times are just theoretical?
I actually live in the US and the car is not a Euro car. I also noticed after 2006 there is no longer the (2) different models. I am happy with mine the way it is but I have seen many spend a good portion of pocket change for 10-15 horsepower.
My thought was maybe a tuning difference or something minor to meet an emissions standard.
ok
Never mind ... I did some reading on it. I hope these same engineers are not calculating a precision landing on the moon. You could wind up 100's of miles in either direction.
I actually live in the US and the car is not a Euro car. I also noticed after 2006 there is no longer the (2) different models. I am happy with mine the way it is but I have seen many spend a good portion of pocket change for 10-15 horsepower.
My thought was maybe a tuning difference or something minor to meet an emissions standard.
ok
Never mind ... I did some reading on it. I hope these same engineers are not calculating a precision landing on the moon. You could wind up 100's of miles in either direction.
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
Last edited by XCrossWindsX; 04-20-2015 at 05:28 PM. Reason: SAE Net vs DIN
#5
![Default](/forum/images/icons/icon1.gif)
I thought about that but then why would the 0-60 / 1/4 mile times be different? Excuse my ignorance. All those times are just theoretical?
I actually live in the US and the car is not a Euro car. I also noticed after 2006 there is no longer the (2) different models. I am happy with mine the way it is but I have seen many spend a good portion of pocket change for 10-15 horsepower.
My thought was maybe a tuning difference or something minor to meet an emissions standard.
ok
Never mind ... I did some reading on it. I hope these same engineers are not calculating a precision landing on the moon. You could wind up 100's of miles in either direction.![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
I actually live in the US and the car is not a Euro car. I also noticed after 2006 there is no longer the (2) different models. I am happy with mine the way it is but I have seen many spend a good portion of pocket change for 10-15 horsepower.
My thought was maybe a tuning difference or something minor to meet an emissions standard.
ok
Never mind ... I did some reading on it. I hope these same engineers are not calculating a precision landing on the moon. You could wind up 100's of miles in either direction.
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
#6
![Default](/forum/images/icons/icon1.gif)
No it gives both 0-60mph and 0-100kph times on both models. If you look at the detailed specifications it even gives you a much more thorough range of specifications.
Its really a useless argument though and not worth our time. But as is, one method or the other is wrong or both are wrong. You can not use 2 methods on the same engine and come up with 2 different results and both be right. (not factoring in different conditions at time of testing, which they do not)
My thought is they probably did the testing at different times. The US model may have been spec'd at a later time and the engines at that time (both Euro & Northern Hemisphere) had better program tuning or better parts & improved manufacturing. The Euro spec's just were not updated and the spec's copied from year to year under the 4.0 engine. I just do not understand how it could have happened twice.
Because the 4.2 engine spec's is a whole different set.
Its really a useless argument though and not worth our time. But as is, one method or the other is wrong or both are wrong. You can not use 2 methods on the same engine and come up with 2 different results and both be right. (not factoring in different conditions at time of testing, which they do not)
My thought is they probably did the testing at different times. The US model may have been spec'd at a later time and the engines at that time (both Euro & Northern Hemisphere) had better program tuning or better parts & improved manufacturing. The Euro spec's just were not updated and the spec's copied from year to year under the 4.0 engine. I just do not understand how it could have happened twice.
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
#7
![Default](/forum/images/icons/icon1.gif)
I thought about that but then why would the 0-60 / 1/4 mile times be different? Excuse my ignorance. All those times are just theoretical?
I actually live in the US and the car is not a Euro car. I also noticed after 2006 there is no longer the (2) different models. I am happy with mine the way it is but I have seen many spend a good portion of pocket change for 10-15 horsepower.
My thought was maybe a tuning difference or something minor to meet an emissions standard.
ok
Never mind ... I did some reading on it. I hope these same engineers are not calculating a precision landing on the moon. You could wind up 100's of miles in either direction.![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
I actually live in the US and the car is not a Euro car. I also noticed after 2006 there is no longer the (2) different models. I am happy with mine the way it is but I have seen many spend a good portion of pocket change for 10-15 horsepower.
My thought was maybe a tuning difference or something minor to meet an emissions standard.
ok
Never mind ... I did some reading on it. I hope these same engineers are not calculating a precision landing on the moon. You could wind up 100's of miles in either direction.
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
They varies quite a lot. My 4.0 XJR is officially 267kw ( 363 EU hp ) as stock, but the same car without any kind of power differences is 370hp in the US.
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