View Full Version : Quattro and oversteer (long)


Urquattro
01-17-1999, 09:16 AM
Recent posts have raised the subject of oversteer. Some folks are even referring to an "oversteer problem." I have owned both an 83 Quattro ad a 98.5 A41.8TQ and can share some observations. I owned the urQ for five years in Clorado, hence had many miles on snowy mountain roads, Steamboat ice driving school, etc. <p>The original quattro system with manually operated center and rear differential locks typically understeered, from mildly to, at times, excessively. Oversteer could be induced by lifting the throttle suddenly (and not always predictably) to induce a weight cange, but power oversteer was rare. Typically, adding more power resulted in more understeer, sometimes unrecoverable. I left quattro-sized dents in several snowbanks to prove it. The rally drivers of course used left foot braking to induce a bit of tail out drift, but on the road cars, the brake balance was such that left foot braking was less effective, at least for me.<p>Twelve years later, I am spending my first winter with the A4Q after plenty of oversteer fun in an 88 M3. The new quattro system with Torsen is in my view a vast improvement over the old. Yes, it will oversteer under power. Especially in a short radius turn, when the fronts are traveling a greater distance, the Torsen "reads" the frn slipping (mechanically) and diverts torque to the rears. The new quattro system is thus steerable with the throttle and no longer plaqued with big understeer, which makes it a more sporting ride. It feels a bit like a rear wheel drive car but with massive grip. Advice to those exploring oversteer, either intentionally or not. Learn about your car's limit behavior in a snowy parking lot, or better yet, take an ice driving school. Also, ditch the Sport 8000's and put on some real snow tires in the winter.

john song
01-17-1999, 09:32 AM

Ray Calvo
01-17-1999, 02:40 PM

johnc
01-17-1999, 05:08 PM