So, with the new A3 3.2Q coming to North America soon, I got into reading about the relative advantages/disadvantages of the Haldex system as compared to the Torsen system.

I know, technically, how they work, and I read through some posts from several years ago. As far as I can tell, Torsen is "safer" in that torque is always split and the system reacts faster to wheel slip. Haldex, however, offers better performance and has a wider operating range (i.e. can transfer a higher percentage of total torque). What do people have to say about this? Opinions/thoughts/flames/real world experiences welcome.

about it.

I far prefer the torsen, but not like I can complain now, as my A3 is FWD. :P

If haldex defaulted to 100% RWD, then folks would be a lot happier with it.

and seem to like it a lot.<ul><li><a href="http://www.eiptuning.com/eip/haldex_popup.html">http://www.eiptuning.com/eip/haldex_popup.html</a</li></ul>

But how is FWD-&gt;AWD actually worse than RWD-&gt;AWD? Do you end up having torque steer issues and such, like a regular FWD?

&lt;dreaming&gt;
Couldn't you, in theory, modify the Haldex software to make it RWD-&gt;AWD? Or, taking that idea further, have a switch (a la APR FlipSwitch, etc) to be able to set FWD/RWD/50-50 under normal conditions? I'd like to see *that*...
&lt;/dreaming&gt;

Note: Audi A3, sportsback model 2004 is equipped with Haldex gen2 and will not work with the HPP.

most likely in the works. No release date or other info.

and has better handling characteristics

the motor placement helps too

I installed it on my current TT and it is a worth while upgrade.

Gives the car a more neutral drive.

I love it!