Why does Jaguar understate performance specs?
#1
Why does Jaguar understate performance specs?
According to Jaguar, the 5.0 XKR has a zero to 60 time of 4.6 seconds. But on the zeroto60times.com website, performance is listed as 3.9 seconds zero to 60 and 12.1 seconds in the quarter mile. Anybody know what the reasoning would be for understating performance?
#3
#5
There are a lot of factors in 0-60, tire temp, road traction, air temp, humidity, quality of fuel, etc.
Then there is over time detrimental performance from build up and variance between units when new.
Magazines report what they find, the manufacturer reports what they consider to be the least flattering end of a likely tolerance variable.
Then there is over time detrimental performance from build up and variance between units when new.
Magazines report what they find, the manufacturer reports what they consider to be the least flattering end of a likely tolerance variable.
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chazaroo (05-25-2018)
#7
Traction seems to be the biggest issue with the 5 litre. My best standing quarter when the car was stock was 12.533 and that only dropped slightly to 12.521 with the XKR-S tune even though the terminal speed was 2.77 mph higher.
I also struggle to do 0-60's in much under 5 seconds so I am trying to wear out my Dunlop Sport Maxx's as quickly as possible so that I can get some PS4S's!
I also struggle to do 0-60's in much under 5 seconds so I am trying to wear out my Dunlop Sport Maxx's as quickly as possible so that I can get some PS4S's!
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chazaroo (05-26-2018)
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#8
Traction seems to be the biggest issue with the 5 litre. My best standing quarter when the car was stock was 12.533 and that only dropped slightly to 12.521 with the XKR-S tune even though the terminal speed was 2.77 mph higher.
I also struggle to do 0-60's in much under 5 seconds so I am trying to wear out my Dunlop Sport Maxx's as quickly as possible so that I can get some PS4S's!
I also struggle to do 0-60's in much under 5 seconds so I am trying to wear out my Dunlop Sport Maxx's as quickly as possible so that I can get some PS4S's!
#10
It has amused me reading reviews on tires to see people complain of their OEM tire, and how much gripper their new tire they switched to was when I have had both tires new, and while there was a difference in feel and ride, the grip was about the same.
A tire that sees less sun exposure, and is not in temperature extremes will have longer lasting tires.
My tires get a lot of sun exposure, and there is also a wide range of operating temperature. The fall off will vary.
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chazaroo (05-26-2018)
The following users liked this post:
chazaroo (05-26-2018)
#12
Drag strips are slippery as all get out unless you have slicks. You want to feel true performance, go find some freshly laid concrete on a straight stretch of road. There's a bridge over the Lillypons estate in Frederick County, MD that's a legendary street race spot. Bridge is @ 1/4 mile of 2 lane concrete and launching from a stand still is way, way more spectacular versus the drag strip where you are peddling to get off the line clean. I felt the seat back flexing on my Mustang it was so violent. Never felt it before or after.
The following 2 users liked this post by Ranchero50:
chazaroo (05-26-2018),
sparky fuze (05-26-2018)
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