Quattro vs X-Drive video

dude007 · 12-13-2006, 11:55 AM

http://video.google.com/videoplay?do...8466&q=quattro

I didn't expect Quattro to fail this test. Any thoughts why it couldn't transfer power to front wheels?

NaViT · 12-13-2006, 12:03 PM

what in the world is that guy saying thru out the whole video??

DFW_M · 12-13-2006, 12:04 PM

the words are not needed...
I was also surprised with the outcome...

bronco · 12-13-2006, 12:05 PM

wow me either...why is this happening?

MarkA · 12-13-2006, 12:10 PM

And yet :

http://video.google.com/videoplay?do...6503&q=quattro

Hammerfang · 12-13-2006, 12:12 PM

further proof bmw>audi

Norsk · 12-13-2006, 12:14 PM

Wow, that is pretty surprising :mad: for the Audi.

Quite Impressive for the BMW

+1 to BMW

18LLC · 12-13-2006, 12:14 PM

audi is full time awd, isn't it? why only rear wheel?

dude007 · 12-13-2006, 12:17 PM

Quote:

Originally Posted by MarkA

And yet :

http://video.google.com/videoplay?do...6503&q=quattro

Yes, I saw this video too. However, it was done in 2003 when 3 and 5 series used permanently locked AWD system, not intelligent at all. SUV had more problems coming up the hill because of their weight. So, it would be interesting if someone repeats this test again with current AWD systems.

noro · 12-13-2006, 12:17 PM

I vaguely recall something about that in quattro the wheels have to have at least a little bit of resistance. In this case they had 0, which is a rare case

Norsk · 12-13-2006, 12:29 PM

In the first vid, Newer xDrive on 5 Series.

In the second vid, older xDrive on 3 and X5.

Would like to see new test as well; but all in all Audi's Quattro is one of the best AWD systems out there.

BKsBimmer · 12-13-2006, 12:36 PM

You sure that Audi has quattro? Not all A6's are standard with quattro.

dude007 · 12-13-2006, 12:40 PM

Quote:

Originally Posted by BKsBimmer

You sure that Audi has quattro? Not all A6's are standard with quattro.

Audi A6 are either AWD or FWD. FWD would not have a problem with rear wheels slipping.

Smythe · 12-13-2006, 12:49 PM

The reason the A8 didn't go anywhere in the first video is because there was zero (or close to zero) torque resistance from the rear wheels. The Torsen (Torque-sensing) center diff will dynamically and instantly transfer more torque to the axle that has greater torque resistance. However, when torque resistance on one side of the Torsen goes to zero, the Torsen acts like an open differential, resulting in what you saw in the video. I think that test is a little unfair, because 100% front traction and 0% rear traction is a pretty rare condition.

Also, I am not familiar with the xDrive, so I can't compare.

dude007 · 12-13-2006, 12:58 PM

Quote:

Originally Posted by Smythe

The reason the A8 didn't go anywhere in the first video is because there was zero (or close to zero) torque resistance from the rear wheels. The Torsen (Torque-sensing) center diff will dynamically and instantly transfer more torque to the axle that has greater torque resistance. However, when torque resistance on one side of the Torsen goes to zero, the Torsen acts like an open differential, resulting in what you saw in the video. I think that test is a little unfair, because 100% front traction and 0% rear traction is a pretty rare condition.

Also, I am not familiar with the xDrive, so I can't compare.

It means Quattro would fail this test too:
http://www.canadiandriver.com/articles/pw/xdrive.htm
It sounds like X-Drive is way better on ice.

epiphone3 · 12-13-2006, 01:21 PM

AUDI SUCKS!

18LLC · 12-13-2006, 01:25 PM

Quote:

Originally Posted by Smythe

The reason the A8 didn't go anywhere in the first video is because there was zero (or close to zero) torque resistance from the rear wheels. The Torsen (Torque-sensing) center diff will dynamically and instantly transfer more torque to the axle that has greater torque resistance. However, when torque resistance on one side of the Torsen goes to zero, the Torsen acts like an open differential, resulting in what you saw in the video. I think that test is a little unfair, because 100% front traction and 0% rear traction is a pretty rare condition.

Also, I am not familiar with the xDrive, so I can't compare.

i think you are right. maybe is becasue audi's sensor more smarter than bmw, so it knows that audi is not in bad weather condition.

FirstClass · 12-13-2006, 01:27 PM

Quote:

Originally Posted by dude007

Audi A6 are either AWD or FWD. FWD would not have a problem with rear wheels slipping.

I wasn't aware Audi produced any car without Quattro. But apparently they do.

dude007 · 12-13-2006, 01:34 PM

I'd like to thanks Smythe and Noro for explanation. I read everything I could find on X-Drive but don't know enough about other systems like Quattro and 4-Matic.

kuthair · 12-13-2006, 01:36 PM

Quote:

Originally Posted by 18LLC

i think you are right. maybe is becasue audi's sensor more smarter than bmw, so it knows that audi is not in bad weather condition.

There is no sensor... it's completely mechanical. The Torsen diff is the same system that is in the Hummer.

I can't view this video at work, is this the one with the rollers?

kuthair · 12-13-2006, 01:37 PM

Quote:

Originally Posted by dude007

It means Quattro would fail this test too:
http://www.canadiandriver.com/articles/pw/xdrive.htm
It sounds like X-Drive is way better on ice.

Where oh where did you come to that conclusion? The article doesn't mention Audi's Quattro anywhere.

FirstClass · 12-13-2006, 01:42 PM

Quote:

Originally Posted by kuthair

I can't view this video at work, is this the one with the rollers?

Yup.

12-13-2006, 11:55 AM	#1
dude007 Private First Class 10 Rep 136 Posts Drives: BMW 325xit Join Date: Nov 2005 Location: NJ iTrader: (0)	Quattro vs X-Drive video http://video.google.com/videoplay?do...8466&q=quattro I didn't expect Quattro to fail this test. Any thoughts why it couldn't transfer power to front wheels?
	Appreciate 0 Tweet Quote

12-13-2006, 12:03 PM	#2
NaViT Banned 69 Rep 3,404 Posts Drives: 04 M3/E92 335i Join Date: Sep 2006 Location: N.Florida iTrader: (11)	what in the world is that guy saying thru out the whole video??
	Appreciate 0 Quote

12-13-2006, 12:04 PM	#3
DFW_M Major General 1676 Rep 6,593 Posts Drives: Macan GTS Join Date: Jul 2006 Location: Dallas, TX iTrader: (4)	the words are not needed... I was also surprised with the outcome...
	Appreciate 0 Quote

12-13-2006, 12:05 PM	#4
bronco Colonel 76 Rep 2,104 Posts Drives: e92 Join Date: Nov 2006 Location: Atlanta iTrader: (0)	wow me either...why is this happening? __________________ SaaS - The world of tomorrow is already here...www.saaschronicles.com
	Appreciate 0 Quote

12-13-2006, 12:10 PM	#5
MarkA Resident Nürburgring Junkie 17 Rep 195 Posts Drives: 320Si Join Date: Apr 2005 Location: The Netherlands iTrader: (0)	And yet : http://video.google.com/videoplay?do...6503&q=quattro __________________ 2006 320Si 6MT, Titansilber, M-Sport Pack, 18'' Si Wheels, Anthracite headlining, Blue shadow Alcantara, Shadowline Exterior Trim, Si Alum Interior Trim, PDC, Voice Control, Pro Nav, iDrive, Blacklines, Light/Rain Sensor, Auto Aircon, iPod Integration, Bluetooth integration, BMW Alarm.
	Appreciate 0 Quote

12-13-2006, 12:12 PM	#6
Hammerfang Private First Class 15 Rep 159 Posts Drives: 2017 F31 330i M-sport Join Date: Apr 2006 Location: NJ iTrader: (0)	further proof bmw>audi
	Appreciate 0 Quote

12-13-2006, 12:14 PM	#7
Norsk Major 42 Rep 1,096 Posts Drives: F10 535i Join Date: Oct 2006 Location: Canada iTrader: (0)	Wow, that is pretty surprising :mad: for the Audi. Quite Impressive for the BMW +1 to BMW
	Appreciate 0 Quote

12-13-2006, 12:14 PM	#8
18LLC Major General 149 Rep 5,104 Posts Drives: e89 Join Date: Oct 2005 Location: California iTrader: (0)	audi is full time awd, isn't it? why only rear wheel? __________________
	Appreciate 0 Quote

12-13-2006, 12:17 PM	#10
noro Colonel 90 Rep 2,707 Posts Drives: '91 M3, '04 E46 ZHP, '72 2002 Join Date: Aug 2006 Location: Boston iTrader: (0)	I vaguely recall something about that in quattro the wheels have to have at least a little bit of resistance. In this case they had 0, which is a rare case __________________ zhpregistry.net - ZHP stats and free classifieds.
	Appreciate 0 Quote

12-13-2006, 12:29 PM	#11
Norsk Major 42 Rep 1,096 Posts Drives: F10 535i Join Date: Oct 2006 Location: Canada iTrader: (0)	In the first vid, Newer xDrive on 5 Series. In the second vid, older xDrive on 3 and X5. Would like to see new test as well; but all in all Audi's Quattro is one of the best AWD systems out there.
	Appreciate 0 Quote

12-13-2006, 12:36 PM	#12
BKsBimmer Lieutenant Colonel 87 Rep 1,645 Posts Drives: 2006 330xi Titanium Silver Join Date: Dec 2005 Location: USA / Silver Spring, Maryland iTrader: (0) Garage List 2006 330xi [10.00] 2006 330xi [0.00]	You sure that Audi has quattro? Not all A6's are standard with quattro. __________________ _____________________________________
	Appreciate 0 Quote

12-13-2006, 12:49 PM	#14
Smythe Private 5 Rep 72 Posts Drives: LR3, e90 335i (Montego) Join Date: Oct 2006 Location: Los Altos, CA iTrader: (0)	The reason the A8 didn't go anywhere in the first video is because there was zero (or close to zero) torque resistance from the rear wheels. The Torsen (Torque-sensing) center diff will dynamically and instantly transfer more torque to the axle that has greater torque resistance. However, when torque resistance on one side of the Torsen goes to zero, the Torsen acts like an open differential, resulting in what you saw in the video. I think that test is a little unfair, because 100% front traction and 0% rear traction is a pretty rare condition. Also, I am not familiar with the xDrive, so I can't compare.
	Appreciate 0 Quote

12-13-2006, 01:21 PM	#16
epiphone3 Lieutenant Colonel 112 Rep 1,772 Posts Drives: 2013 BMW X3 35i Join Date: Oct 2005 Location: Calgary iTrader: (0)	AUDI SUCKS!
	Appreciate 0 Quote

12-13-2006, 01:34 PM	#19
dude007 Private First Class 10 Rep 136 Posts Drives: BMW 325xit Join Date: Nov 2005 Location: NJ iTrader: (0)	I'd like to thanks Smythe and Noro for explanation. I read everything I could find on X-Drive but don't know enough about other systems like Quattro and 4-Matic.
	Appreciate 0 Quote