whale-tail wagging, (was Volvo AWD)

[dailojeff@juno.com (Jeff Loh)]

Phil writes:
"A (non-Audi) question - chasing the Porsche I noticed his rear grill
would 
swing up and down - sometimes at picnic table level, sometimes flush with
the 
body and never stationary in between.  What is this - is it a feature?"

What you saw was the 911's active aero tail. It goes up at approx 80kmh
and back down at approx 50kmh. Apparently to increase downforce at high
speeds and offer better cooling to the engine. I believe the new Boxter
also has a similar feature.

/J.