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Old 03-05-2010, 02:05 PM   #1
rsholland
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Default Great video on how Audi's Quattro AWD works

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Old 03-05-2010, 02:18 PM   #2
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watching that vehicle makes me respect the concept of the subyota coupe with it being rwd and light.. with that said, i wonder when subaru will get torque vectoring awd
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Old 03-05-2010, 04:27 PM   #3
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thats amazing! I DO NOT understand how it works still

Is that the same thing the GTI comes with?

If it wasn't for Audi Subaru would just be another fwd/rwd brand, after all Audi invented AWD.
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Old 03-05-2010, 05:13 PM   #4
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"Audi quattro" is not the same system on different models...some use TorSen and some use Haldex.
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Old 03-05-2010, 05:36 PM   #5
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Hmm, I did not realize Quattro (the real deal, not Haldex) is not symmetrical like Subaru's AWD system. I.e. it has a separate front drive shaft, as opposed to the front driveshaft-inside driven gear shaft.

That also explains how they were able to move the front diff in front of the clutch/fly on the recent MLP platform Audis.

Anyone knows if Porsche (911 AWD) have symmetrical layout like Subaru's?
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Old 03-05-2010, 05:38 PM   #6
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Quote:
Originally Posted by boxerinside View Post
thats amazing! I DO NOT understand how it works still

Is that the same thing the GTI comes with?

If it wasn't for Audi Subaru would just be another fwd/rwd brand, after all Audi invented AWD.
No, Subaru had 4WD systems before Audi, I believe. It seems they also invented the symmetrical layout (unless it was Porsche, I don't know). Subaru was just late to add center diff to their 4WD system to make it AWD.
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Old 03-05-2010, 07:55 PM   #7
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Looks complicated and expensive. I think I'll stick to the tried and true 6 speed in the STI. That thing can be hammered on before it breaks. Looks at ken blocks gymkana car! As BROTACULAR as this post may sound there are some engineering principles that Subaru understood when they made the 6 speed.

Also, Audi doesn't even have the ground clearance to employ all their high tech wizardry.
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Old 03-05-2010, 09:16 PM   #8
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Quote:
Originally Posted by Not-EWRX View Post
There are some engineering principles that Subaru understood when they made the 6 speed.
Yeah that the Germans are the best engineers in the world!
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Old 03-05-2010, 11:17 PM   #9
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Yeah that the Germans are the best at overcomplicated engineering in the world!
That's a little more correct.
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Old 03-06-2010, 04:07 AM   #10
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Audi is commemorating the 30th anniversary of the iconic Audi Quattro this week.

Autocar's Vicky Parrott was taken for a ride by Walter Rohrl at the Col de Turini and you can see the video by clicking on the link below. We've also assembled pictures of Quattro rally and road cars in action and you can find the link for the gallery

below, too.

e=player_embedded

The Audi Quattro, which was unveiled at the Geneva motor show 30 days ago this week, is well known for pioneering full-time four wheel drive in road cars when it first arrived in 1980, but it was in Group B rallying that the Quattro really made its name as a performance car.
The Quattro began rallying in 1980, and took Hannu Mikkola to the driver’s World Rally Championship title in 1983. It was then modified for the 1984 season, when the straight-five, turbocharged 2110cc was uprated to around 265bhp and 332lb ft of torque.
Lightweight Kevlar wheel arches were also used to save weight, and by this point the Audi Quattro A2 WRC car was capable of 0-62mph in 4.2 seconds. It went on to win the drivers’ and manufacturer’s 1984 WRC titles at the hands of Stig Blomqvist.

Though Audi doesn’t compete in rallying any more, the German maker still uses the Quattro name for its four-wheel drive cars and in 2009 over a third of the 931,007 Audis that were produced used Quattro technology.

http://www.autocar.co.uk/News/NewsAr...llCars/247929/

Last edited by AVANTI R5; 03-06-2010 at 07:13 AM.
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Old 03-06-2010, 06:15 AM   #11
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Quote:
Originally Posted by Stanley View Post
"Audi quattro" is not the same system on different models...some use TorSen and some use Haldex.
There are 3 different AWD setups (FWD based Haldex), the torsen as above and then the Q7 setup that uses a separate transfer case.
Personally, I think the Q7 setup is the best
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Old 03-06-2010, 10:42 AM   #12
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Quote:
Originally Posted by rypt View Post
There are 3 different AWD setups (FWD based Haldex), the torsen as above and then the Q7 setup that uses a separate transfer case.
Personally, I think the Q7 setup is the best
And Subaru has several systems too. The VTD system (and the STI's VTD w/ DCCD) is by far the most advanced, the Active AWD system in the 4EAT and CVT equipped cars and Continuous in the 5MT and non-STI 6MTs. Each has its strengths and weaknesses.
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Old 03-06-2010, 01:21 PM   #13
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The reason that Audi's systems are more advanced than Subaru's is due to the price point they sell at. The STi has more tech than the WRX, because its 5-10k more $$.

The Quattro system found in the A4, A5, A6, A8 are all the old style quattro, very similar in basic design and layout to the Subie. They have a front driveshaft and diff inside the tranny case, making lighter than the separate systems used by Infiniti, BMW, and Mercedes.

Audi TT, A3, (Q5?) are Haldex, from VW's awd seen on some passats back in the day, and in the R32. This is similar in design and layout to the AWD in the EVO.

Audi Q7 is more like a typical 4WD with a transfer case. More like a Jeep or Land Rover in concept. This is better for rock crawling and towing due to strength and low speed ratios.
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Old 03-06-2010, 02:26 PM   #14
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the quattro in my A8 is symmetrical.
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Old 03-06-2010, 02:33 PM   #15
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Originally Posted by SubasaurusWrex View Post
the quattro in my A8 is symmetrical.
Where's front dif?
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Old 03-06-2010, 03:02 PM   #16
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Quote:
Originally Posted by Derbagger View Post
Audi Q7 is more like a typical 4WD with a transfer case. More like a Jeep or Land Rover in concept. This is better for rock crawling and towing due to strength and low speed ratios.
The Q7 doesn't have a transfer case, unlike the (out-going) Touareg and Cayenne.

Bob
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Old 03-06-2010, 04:48 PM   #17
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the quattro in my A8 is symmetrical.
Does not look like it is.
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Old 03-07-2010, 07:26 AM   #18
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Quote:
Originally Posted by Derbagger View Post
Audi Q7 is more like a typical 4WD with a transfer case. More like a Jeep or Land Rover in concept. This is better for rock crawling and towing due to strength and low speed ratios.
Quote:
Originally Posted by rsholland View Post
The Q7 doesn't have a transfer case, unlike the (out-going) Touareg and Cayenne.
The Q7 does have a transfer case but it is only single speed (so no low range).
It uses a Torsen T3 diff in there.
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Old 03-08-2010, 12:18 PM   #19
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sadly 95% of americans think when their car says AWD, they can go anywhere and do anything.. Most AWD systems found on smaller SUVs like toyotas and hondas are barely even considered AWD in my book...
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Old 03-08-2010, 01:12 PM   #20
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Soo... if I understood that correctly, "torque vectoring" in this case is simply applying the brakes on the inside wheels, not relying on smart differentials to apply torque differently on the inside and outer wheels?

Does that seem kind of crappy to anyone else?
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Old 03-08-2010, 01:20 PM   #21
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Old 03-08-2010, 01:26 PM   #22
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Quote:
Originally Posted by Derbagger View Post
The reason that Audi's systems are more advanced than Subaru's is due to the price point they sell at. The STi has more tech than the WRX, because its 5-10k more $$.

The Quattro system found in the A4, A5, A6, A8 are all the old style quattro, very similar in basic design and layout to the Subie. They have a front driveshaft and diff inside the tranny case, making lighter than the separate systems used by Infiniti, BMW, and Mercedes.

Audi TT, A3, (Q5?) are Haldex, from VW's awd seen on some passats back in the day, and in the R32. This is similar in design and layout to the AWD in the EVO.

Audi Q7 is more like a typical 4WD with a transfer case. More like a Jeep or Land Rover in concept. This is better for rock crawling and towing due to strength and low speed ratios.

Q5 is based an the A4 paltform, so its pretty safe to say that they use the same Quattro system.
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Old 03-08-2010, 01:38 PM   #23
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Quote:
Originally Posted by TimStevens View Post
Soo... if I understood that correctly, "torque vectoring" in this case is simply applying the brakes on the inside wheels, not relying on smart differentials to apply torque differently on the inside and outer wheels?

Does that seem kind of crappy to anyone else?
I was thinking the same thing. I guess its cheaper, but what will it do to your brake pads?
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Old 03-08-2010, 05:41 PM   #24
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Quote:
Originally Posted by TimStevens View Post
Soo... if I understood that correctly, "torque vectoring" in this case is simply applying the brakes on the inside wheels, not relying on smart differentials to apply torque differently on the inside and outer wheels?

Does that seem kind of crappy to anyone else?
Quote:
Originally Posted by thestig2284 View Post
I was thinking the same thing. I guess its cheaper, but what will it do to your brake pads?
Ditto. I saw the green brake lines, calipers, and rotors light up during the video and did a little mental :facepalm:

Contrast this to how Mitsubishi's Super Active Yaw Control (S-AYC, now part of the Evo X's S-AWC system) system works:

http://www.mitsubishi-motors.com/cor...003/15E_11.pdf
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Old 03-08-2010, 05:50 PM   #25
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Interesting. I'm actually more inclined (rimshot ) to consider an Acura and their SH-AWD after seeing this video.
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