Both Automobile and Car and Driver report "loose rear end" at high speed...any truth to it?
08-22-2006, 09:10 AM
#1
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Both Automobile and Car and Driver report "loose rear end" at high speed...any truth to it?
If so, what could be the cause?
Doesn't make sense to me.
I've had my B6 S4 on Road Atlanta in excess of 120mph and never felt anything like that. The RS4 should be no different.
Any ideas why are they reporting this?
Doesn't make sense to me.
I've had my B6 S4 on Road Atlanta in excess of 120mph and never felt anything like that. The RS4 should be no different.
Any ideas why are they reporting this?
08-22-2006, 09:21 AM
#3
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Here's an excerpt from the C&D review:
Road Test Review: 2007 Audi RS 4 Quattro - Road Tests
The mid-size sports-sedan wars get kicked up a notch.
BY BARRY WINFIELD, PHOTOGRAPHY BY MORGAN J. SEGAL
September 2006
"At 150 mph down the long straight at our high-desert testing ground, the '07 Audi RS 4 performs the same gentle rear-end boogie I remember from an autobahn experience with it in Germany. That particular dance partner was a German model we were testing alongside a BMW and Mercedes-Benz, and all three drivers that day remarked on the peculiar rear-end gyration.
For a car designed and developed within a stone's throw of the world's fastest public roads, it's a strange inconsistency. At the big track at Willow Springs International Motorsports Park in Southern California where Audi staged its stateside introduction, the RS 4 would reach maybe 130 mph down the pit straight. At that speed there was no sign of any tail wiggle. But when you got on the brakes hard for Turn Two, there it was again, the slo-mo shimmy.
These mild oscillations never get troublesome, but we're curious about their origin. Perhaps it has something to do with the Quattro all-wheel drive, or the car's 58.3/41.7-percent front-to-rear weight distribution. We can't be certain. But here's something we are sure about. Not many owners will ever see speeds that high. Heaven knows, it's hard enough for us to find appropriate test venues. Most racetracks don't have straights long enough to allow this kind of speed..."<ul><li><a href="http://www.caranddriver.com/roadtests/11333/road-test-review-2007-audi-rs-4-quattro.html">Link to full Car and Driver review</a></li></ul>
The mid-size sports-sedan wars get kicked up a notch.
BY BARRY WINFIELD, PHOTOGRAPHY BY MORGAN J. SEGAL
September 2006
"At 150 mph down the long straight at our high-desert testing ground, the '07 Audi RS 4 performs the same gentle rear-end boogie I remember from an autobahn experience with it in Germany. That particular dance partner was a German model we were testing alongside a BMW and Mercedes-Benz, and all three drivers that day remarked on the peculiar rear-end gyration.
For a car designed and developed within a stone's throw of the world's fastest public roads, it's a strange inconsistency. At the big track at Willow Springs International Motorsports Park in Southern California where Audi staged its stateside introduction, the RS 4 would reach maybe 130 mph down the pit straight. At that speed there was no sign of any tail wiggle. But when you got on the brakes hard for Turn Two, there it was again, the slo-mo shimmy.
These mild oscillations never get troublesome, but we're curious about their origin. Perhaps it has something to do with the Quattro all-wheel drive, or the car's 58.3/41.7-percent front-to-rear weight distribution. We can't be certain. But here's something we are sure about. Not many owners will ever see speeds that high. Heaven knows, it's hard enough for us to find appropriate test venues. Most racetracks don't have straights long enough to allow this kind of speed..."<ul><li><a href="http://www.caranddriver.com/roadtests/11333/road-test-review-2007-audi-rs-4-quattro.html">Link to full Car and Driver review</a></li></ul>
08-22-2006, 09:25 AM
#4
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Link to video review from Automobile:
<ul><li><a href="http://www.automobilemag.com/multimedia/video/0609_2007_audi_rs4/">Click here for Automobile video review of RS4</a></li></ul>
08-22-2006, 09:45 AM
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When braking hard when going fast: true
I don't know if its just the rear end. The car feels like its swaying side to side. Strange sensation, but it doesn't feel like you're going to spin.
I think its the strong brakes and relatively heavy weight.
I don't know if I'm the only here to explain it. Maybe its my driving, who knows.
I think its the strong brakes and relatively heavy weight.
I don't know if I'm the only here to explain it. Maybe its my driving, who knows.
