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The Audi RS6 5.0 TFSI quattro is the land rocket of the Audi A6 models.
It is powered by an all-aluminum alloy 5.0 liter V10 twin-turbocharged Fuel Stratified Injection (FSI) engine.
The V-10 is rated at 580 horsepower, and 479 foot pounds of torque.
The official performance figures for the RS6 Avant are:
0 to 62 mph in 4.1 seconds.
0 to 124 in 13.1 seconds.
It has an electronically governed top speed of 155.3 mph, but you can get a factory option that bumps that figure up to 192.6 mph.
To keep the V-10 cool, the RS6 needs seven radiators, and four electric cooling fans.
Unfortunately, the RS6 Avant will not be available in the U.S., but a sedan was unveiled in August 2008, and will probably be offered in North America.