So far I've heard 2 different stories regarding how Quattro/Torsen works when turning fast and the A4 is understeering(plowing).<p>The first is that under understeering, the torsen will send the power to the front because the rear wheels will be spinning while the fronts are spining less. Therefore making the car even more understeer.<p>The second story is that when you are understeering you need to step on the gas, then the Quattro will send more power to the rear therefore making the car oversteer and balance the steering to neutral.<p>I've just drove A4 and tested this and as far as I can tell, giving more gas resulted in more understeer and not oversteer/neutral.<p>Who is right?<br>

Having taken my car on a race track, I agree with your observation.<br>Doing a hard 180 turn, when i was flooring the accelerator, the car just understeered badly.<br>But there is a way not to do this. I was shown at the Quattro experience day by this German driver.<br>Its hard to explain, I will wait to the next track day to try it then i should be able to explain it. But It involves hitting the brake for a second to shift the balancing of the car.

Understeer is the overloading of the front tires. Depending on the traction! adding more throttle will give a bit of oversteer (more through F-R weight transfer!), which counteracts this.<p>BUT! What is really happening here is that the chassis is overloaded on the front end. Turn into the corner a little earlier, brake just a touch later into the corner, above all, be smoooooth. Try to feel where the weight is going.

<br>The torsen reduces understeer significantly. The front wheels are following a larger circle than the rears so they try to spin faster. The torsen fights letting them spin faster than the rears. This means that the fronts are under braking compared to the rears. Therefore the front tucks in, while the rears are under power and try to slide. All of this is a VERY minimal effect, but it adds up to balancing the car.<p>Left foot braking on entry and being at least lightly on the power during the turn help a lot. Tapping the brakes settles the car down on the front suspension, and power during the turn increases the effectiveness of the torsen.<p>My $0.02<p>Todd W