I know that Jaguar lists the STR's 0-60 at 5.3 sec, but does anyone have any other personal experiences/information and/or other sources that either upholds or contradicts Jag's claims?

I personally think that is a VERY conservative number, as does many others with whom i have spoken with.

Thoughts/opinions?

 

Probably checked by car reviewers. At least some of them will have had a go, you'd think.

 

Unfortunately most reviews I have read are for the SType in general, and they reference the R usually quoting Jaguar's claims of their 0-60, 1/4 mile and HP claims.

 

Hi Bull27,

About 10 years ago R&T tested an XJR and had a 5.1 0-60 time. Since the STR is lighter than the X308 series I would guess somewhere around 4.8 to 5.0 might be accurate depending on driver.

Mike

 

if you could get the damn thing to rev up to 6100rpm in first and second i reckon you could get under 5

......fast car event in the UK in September have a 0-60 sprint with a real pukka radar gun set up......just need to persuade the wife to let me use the Jag!!

 

Agreed: 1st gear really pisses me off, but u can use the J Gate to get 2nd up there, even though Im not a big fan.

 

Bull, you're the STR owner that couldn't get the TCM to reset and thus consistently get 6100 gear shifts, arent ya?

 

How do you do that?

 

Unfortunately I'm not that guy...I did just have the J004 recall done which included a TCM reflash. Was advised to keep it out of sport mode for 200 miles, which I did. As soon as I got it back I started stomping on it in regular mode. Can only do that for so long, car is fast, and dont need any tickets. Now its back to the way it was, early shifting in 1st and 2nd.

 

I think that 5.3 is a very accurate number.

 

Enthusiast, yeah have to agree......especially as ours has 75k under its belt!!! Bull, good shout about the J gate.......does really make me think as i am presuming that the 5.3 was recorded with the short shifts at 5250 in first making no where near peak power.....then think it drops 500rpm when hitting second so say at 4750, again way below peak power.....still think if it would rev out you would easy see a sub 5 second!!!

Oh yeah had the ECU re-flash and adaptive drive done in the UK and made didly squat difference.....unfortunately.

 

I really there was some hard evidence to go by. I would have to disagree, I think its faster than the 5.3, again, given that the tranny isnt shifting at ridiculously low rpms and/or your just using JGate.

 

I'm an avid reader of the all the enthusiast magazines (CD, MT, Road & Track, Automobile, EVO and Winding Road) and the lowest I've seen (internet spec from some road review that I can't recall) was 5.1 secs. 5.3 was the actual tested spec from 2003 in a number of magazines and I remember a 5.4 and a terrible 5.7 from some super sedan comparo test.

Also noteworthy - and it came from a comparo with the old M5 - is the lack of endurance the STR has, due to presumably to "heat soak", in straight runs up to 150mph where it lagged big time.

Finally, I've had both the '03 and now an '05. The '05 feels stronger and I'm assuming that it's because the 1st gear shift, while not at redline, is much closer to redline than in my '03. 2nd gear shifts are close enough to redline that I can't tell for sure on the tach, which, again, is higher than on my '03. I can't recall an actual road performance test for an '05 or newer model year.

Now on the website "dragtimes.com" you've got a listing of some 1/4 miles times - the fastest "stock" is listed @ 13.189 for an '03 and the other 5 times range between that number and 13.710.

Based on all the above - I'd be surprised if our cars could sneak under 5.0 secs 0-60mph without some decent mods.

Best,
Eric

 

In the Car and Driver article that mentions the short shifting (at 5250 in 1st gear), they ran 0-60 5.5 secs and 14.1 qtr mile @ 99mph. The Car and Driver comparo article (which also mentions short shifting) quotes 5.4 secs and 13.8 @ 103mph.
Depending on gearing, powerband, etc, shifting at the redline isn't always the fastest. The car isn't hitting peak power in 1st but it's going into 2nd right in the middle of the torque curve. I have a g-meter, I'll have to plug it in and see what I get.

 

It's funny you mention heat soak? The other car I was looking at was a Mercedes E55. Also supercharged with a very similar belt driven super charger. That car is very well known to heat soak badly. Then the computer kills the power. Several mods like a bigger intercooler pump and a bigger intercooler are popular for that car because of this. I have run my 2005 STR hard in very hot Houston weather and have never experienced heat soak?

It was one of the things I thought was better designed in the Jaguar. That is the first test report I have heard that mentions this?
Anybody seeing their STR loose power in hot weather?
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As far as the heat soak issue, it might be a factor. I know that in the winter here when I take off the car sure seems to have more kick. I know that significantly colder air will give better performance, and air being sucked in at -40 will keep things cool, but I can say that the car does sometimes feel like it has a little less kick on those hot summer days compared to the cooler ones.