B7 uses Haldex AWD. I thought it was Torsen.

[A4Kevin]

Excerpt from Audi.co.uk website describing quattro safety in the new B7.

"You can enjoy our patented quattro system on the A4 Avant, with its second-generation Haldex clutch, delivering optimum torque distribution to give you the most involving, sure and safe ride possible."

The B7 S4 is a Torsen system.

[|Sandman|]

If the normal B7 uses Haldex and the S4 uses Torsen, then Audi is installing better parts on the S4 then on the normal B7, on the same system..

[CyberPMG]

Maybe Halidex is used on some of the other engine options that we don't get in North America. The 2.0T and 3.2 FSI engines should be set up with Torsen along with the S4 (and RS4).

[Bronze]

I thought that Torsen was for N/S engines, and Haldex was for transverse engines.

[Matt Devo]

Originally posted by Bronze
I thought that Torsen was for N/S engines, and Haldex was for transverse engines.

it is, that has to be a mistake

[Bronze]

Originally posted by Matt Devo
it is, that has to be a mistake

That's marketing trying to talk engineering.

[lawong]

http://www.audi.co.uk/newcars/perfor...veConnect=true
Click "quattro"

Improved traction, assured road-holding, rock-solid braking, outstanding grip, and reduced tyre wear - the enhanced safety benefits of quattro four-wheel-drive are Audi’s signature. Enjoy the quattro system on the A4 Saloon with its second-generation Haldex clutch, delivering optimum torque distribution to greatly improve drive characteristics. The result? Sports-oriented distribution of power between front and rear wheels that delivers awesome traction, dynamic cornering and impeccable road handling.

Interesting. Up until now, only Volvo used Haldex v2. Haldex v2 is actually impressive on paper.

Volvos (like VW Golfs and Audi TTs) use traversely mounted engines which is perfect for Haldex application.

It would be interesting to see if Audi put a traversely mounted 2.0T or 3.2 in the A4 (doubtful).

Haldex being used for longitudally mounted engines. (possible, but unlikely).

Misprint on the website? (likely)

It looks like someone reused some o fthe same words when they were reporting on the AWD system on the A3 sportback:


http://www.audi.co.uk/newcars/techno...a3/a3sportback
Click "quattro"

Better traction, improved road-holding, highly controlled braking, superior grip, reduced tyre wear and enhanced safety - the benefits of four-wheel-drive have always been obvious to Audi. Now you can enjoy Audi's patented quattro system on the A3 Sportback. With a second-generation Haldex clutch it delivers optimum torque distribution to greatly improve drive characteristics. The result? Sports-oriented distribution of power between front and rear wheels that delivers awesome traction, dynamic cornering and impeccable road handling.

[wsdfOO]

i heard through the grapevine that the 2.0t are going to be mounted transeversely. the torsen does get better mpg, so it can't be such a bad thing.

[A4Kevin]

I heard the gen 2 Haldex is suppose to be pretty good. A big step up from the version in the current R32.

[foofighter]

this was brough up last week...it's a mistake as they were probably referring to the Sportback or the TT...the bigger cars A4,6,8 are still using Torsen.

Although i cant recall where i heard this but the word transverse did come up somewhere in conversation.

[A4Kevin]

Foo

Would the generation 2 haldex system function similar to the earlier versions using the AWD controll unit from Neuspeed?

[foofighter]

no actually the Haldex performance module is completely different. Haldex released it as an actual aftermarket option...the pre-x is something you really want as it's rear wheel biased

[A4Kevin]

So is the prex the second gen haldex? And if so is this the system on the new sportback?

[foofighter]

From my understanding prex is seperate to itself...there's gen 1, 1b, 2,2-prex (which is the most aggressive) current Volvo uses the the prex

[A4Kevin]

Thanks

Just read on EIPs website that the new sportback will have gen 2. Good news for those of us interested in an A3 when it gets here.

http://www.eiptuning.com/eip/haldex_popup.html

[foofighter]

gen 2 but not gen 2 w/ prex!!!

[lawong]

There's a lot of good info regarding Haldex here:

http://www.haldex-traction.com/

[chuckdawg82]

so all in all....the haldex system is better than the torsen system because of the rearwheel bias in he haldex?

[F16HTON]

It is a typo, I am over here in Germany, and the B7s are longitudal. There is a press release regarding the B7 S4 and it is also a torsen diff.

The MK5 VWs and Audis will be using Haldex V2

[lawong]

better is relative. Torsen is good because its a (relatively) simple mechanical system. Haldex is computer controlled system but has many layers of complexity. On paper, Haldex v2 w/pre-X should be the best AWD system out there.

However, since there haven't been any AWD track comparos between Audi, Honda, Mitsu, Nissan, Porsche, Subaru, VW, Volvo its hard to say.