Better than letting misinformation spread.

 

Same reason Lexus claims faster acceleration figures than any independent tests have been able to achieve. It's all about the hype!

 

What are you talking about? Lexus claims 4.6 0-60 mph. I think that is dead on. On a drag strip with drag radials and some minor weight taken out, I get 0-60 in about 4.1 or 4.2 seconds which I've verified with my racelogic. Also, I assume 416 at the crank WITH all the accessories and exhaust and intake because some guys are cranking out about 400 hp with exhaust only. I wonder what a totally uncorked unrestricted 5.0 from our IS-F puts out...475?

 

You've got that backwards, my friend. Most auto manufacturers, including Lexus, under-report acceleration times. This can be proven by comparing published 0-60 stats from a Lexus website vs actual performance numbers recorded in automotive publications (Road & Track, Car & Driver, etc...).

 

I can't comment on the IS line, but I know that Lexus claims 5.2 seconds 0-60 on GS450H and the magazines you mentioned tested 5.5 seconds.
http://www.caranddriver.com/var/ezfl...835df98d32.pdf

On the GS460 they claim 5.4 seconds, but R&T and C&D found 5.5 seconds.
http://www.caranddriver.com/reviews/...take_road_test

On the LS460 Sport Lexus claims 5.4 seconds but C&D found 6.0 seconds.
http://www.caranddriver.com/reviews/...age-quick_spin

So that tells me Lexus is thinking they are faster than they are.

 

Lexus has traditionally been conservative with figures. The IS got a 4.9 run in R&T, the GS 400 got a 5.5 run in Edumunds and the IS has gotten some low 4 second times.

The times for the IS F in regards to 0-60/the 1/4 mile, 0-100 etc show me the HP rating is very accurate.

 

car testing is not an exact science, it is the end result of complex interaction between the environment, the car and the driver. To quote one single test from one single mag is over simplification to say the very least. i respect your points regarding other lexus cars which i don't care much for anyway. as far as ISF is concerned, i have not read a single test that had 0-60 higher than 4.5 seconds which is lower than Lexus' claim of 4.6 seconds. i am sure you can find a mag test that will invalidate lexus claim of 4.6 seconds, but a deviant number really doesn't prove anything. regardless, it's a fast car no matter what lexus or any car mag say.

 

haha lol , not all of us are engineers...

and i'm not entirely sure if its true, but I have heard Edmunds does 0-62mph, (0-100kmh). C&D and R&T do rolling starts which is a more realistic estimate of acceleration as it reduces lost traction and wheel hop associated with a dry start. Anyone that's driven a CTS-V and seen the 0-60 figures would understand this.... Wheel hop and lost traction comparable to a 5L mustang

 

I agree. But for the cars I mentioned, I have not seen a single test which validates Lexus figures. I just quoted these tests because they were the first ones I googled. I understand that with the ISF Lexus figures may be very reasonable - but they probably expected more scrutiny of that car.

BTW I have no explanation of why the LS test is so far off, but with the GS cars my hypothesis is that Lexus put performance tires on for the acceleration stats, and touring low resistance tires for the EPA test, and then sold us the car with the EPA tires.

 

I prefer the 0-60 stat. Partly because it illustrates the benefits of better stock tires and all wheel drive.

 

very true, but they also don't take into account weather or altitude when they do the tests. If you really wanted to get picky everything would be at SAE conditions in an indoor controlled environment. Tire temp, street temp and relative humidity would all come into account as well.. Im coming from an S4 and a 450hp Sierra Denali (both with AWD), and I can tell you that on a hot dry day my ISF hooks up just as hard as either of them from a dry start

 

Perfectly stated. When people ask me what the ISF runs, I simply tell them, "Stock? Depends on conditions and driver skill, but will avg low-mid 4s 0-60 and high 12s in the 1/4."

 

I ran a 12.6 stock, published times I saw were 13.3-12.8 in a 1/4 mile stock.

This car hauls *** for being a 4door luxo sedan. A lot of its magic is in the transmission.

~Dv8

 

I wish there was a like button for comments. Well said lobux