I thought that the Quattro was supposed to have an Haldex clutch, but from the description of the brochure I think that it looks more like Torsen ?

I always thought that Haldex was driving the rear wheel only when slipping occurs...

From the Q3 UK brochure:

Quattro:

It’s the technology that gave us the edge on the rally circuit ever since it was first introduced 30 years ago, bringing victory for the Audi quattro® on its very first outing.

It’s called quattro® permanent all-wheeldrive. In this system, four permanently driven wheels deliver better acceleration, road-holding and safety, while asymmetric dynamic torque distribution intelligently controls the flow of power to the front and rear axles.

Remember, the Q3 is basically a Tiguan. So...

Remember, the Q3 is basically a Tiguan. So...

Yes but this description: "It’s called quattro® permanent all-wheeldrive. In this system, four permanently driven wheels" does not fit the Tiguan.

Could they have decided to bias the Haldex system in the Q3 in order to have "four permanently driven wheels" ? Instead of driving the four wheels only when slippage occurs ?

And maybe the ECO mode could drive only the front wheel unless there is slippage ?

when the engine is positioned correctly from front to rear the superior torsen AWD system is used, a sideways engine used a haldex system due to fitment, the mostly FWD haldex system will get better MPG, while both work the torsen system will give better traction in certain conditions

The Q3 has a Haldex system, unlike the Q5 and Q7

The Q3 has a Haldex system, unlike the Q5 and Q7

I am not familiar at all with AWD technology and terminologies. What do the Q5 and Q7 have?

I am not familiar at all with AWD technology and terminologies. What do the Q5 and Q7 have?

They have a Torsen center diff for the all wheel drive. Pure mechanical.

audi calls their AWD's QUATTRO, VW calls them 4MOTION, same systems used, depending on engine placement. there is REALLY no permanant 4 WD, when cornering the slower turning wheel needs to freewheel to prevent chatter and possible drivetrain issues, what hi$$$ rally cars use may control amount of power under certain conditions that is applied to each wheel. there is a lot of technology that can be used in modern cars depending on cost, what is used in a $30,000 range moderate power car is not suited to a hi powered car, making AWD reliable at different power levels makes much different costs$$$$, do a search there is much info on different AWD and their workings, todays electronics allow much better control than ever before. there are different aftermarket haldex controllers that change power application

The original Haldex systems would only engage when front wheel slippage was detected. I believe the current Haldex IV uses a permanent bias so the rear wheels receive power at all times. If the front wheels slip, the percentage going to the rear is increased.

you must do your homework!! as the saying goes there is much deceptive advertising. everyone wants the most PROFIT they can get. on my inferior 2001 TT quattro wheelspin is a non issue, my 01 jetta wolfsburg with similar power the FWD SUCKED!! massive torque steer and wheelspin!!! for most people the any slightly better AWD system is a big improvement. on the subaru turbo cars power is held down at lower RPM's protecting the mechanicals snd their automatic tranny cars are not as good as the manuals as they run more FWD bias. technology changes but the BEAN COUNTERS $$$ finally decide what we get. a simple mechanical LSD like the quaife makes a FWD car MUCH better without any MPG penalty, but is costly for YOU to install, VW will not put one in although some manufacturers have, my guess is they do not want to loose sales of AWD cars that VAG sells. their cost is much less but they try to electronically - STINKS - control FWD shortcommings. the european turbo focus hot rods used them but ford cheaped out for the US version!!!