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?

 

6-10 hp on a 4,000 Pound car doesn't buy much and I doubt you'd notice the change. You're already pulling close to 300, if that's not enough just look for a XKR and you'll have almost 400. Easiest upgrade to HP.

 

There is no power difference, just different method to measure it - US vs Euro. SAE Net vs DIN , 1.0139 : 1 .

 

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 might be wrong, but isn't one of them 0-60mph and the other 0-100kph? Which is 0-62mph? Hence the slight difference In time?

 

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.

 

Well, you see differences between the magazines who has tested the cars.
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.

 

I think it'll be the 60mph 100kph with someone who's cut/pasted without having a clue they're different speeds (or even what speed is?).