By KBB.com Editors
Not as smooth on the highway as the more mainstream A6 on which it's based, not as quick through a canyon as a similarly-priced Porsche 911 Carrera, Audi's factory-tuned S6like most of Germany's factory-tuned super sedansis nonetheless a brilliant way to enjoy varying degrees of each with only a single monthly payment.You'll Like This Car If...
If you like the seemingly incongruent concept of a lot of performance but with more gentlemanly behavior, the S6 will blow you away with its manners.You May Not Like This Car If...
If you're focused solely on flash and fast, the S6 might not appeal to you as deeply as the BMW M5 or the Mercedes-Benz E63.What's Significant About This Car?
The newest S6 is based on the current-generation A6 that was introduced for the 2005 model year. Compared with its predecessorlast available for the 2003 model year and in wagon form onlythe latest S6 boasts an advantage of 95 horsepower thanks to an engine upgrade from a V8 to V10.Driving It Driving Impressions
Compared to the harder-edged BMW M5 and the neck-snapping Mercedes-Benz E63, the Audi S6 almost feels laid-back at times. Not for a lack of horsepower or agility, mind you, but because of the sheer effortlessness with which it goes about the business of being fast. The resulting confidence makes the S6 a particularly satisfying partner on public roads. The steering and brake systems are tuned appropriately, and you can feel the quattro all-wheel drive system making its contribution to balanced handling. Highway ride comfort takes a slight degradation from the suspension's sport tuning, but even for a long coast-to-coast excursion the S6 would be among our top choices.Favorite Features
LED Daytime Running Lights
Bright white LED daytime running lightsin rows of five set low on either sidegive the S6 one of the most distinctive faces on the road.
We like its smooth power delivery, unique sounds and the simple fact that a V10 is much more of a conversation starter than a V8.
Supportive on both the highway and in the corners, the S6's well-bolstered front seats perfectly exemplify the car's balanced persona. Like most Audi passenger cabins, the feeling of quality is palpable and the sense of style is impeccable. The standard wood trim is attractive, but the carbon fiber available as an upgrade is exceptional. Audi's MMI(tm) central control system is among the more intuitive of these systems on the market today.Exterior
Visually, the S6 is distinguished from the A6 by a collection of subtle but aggressive styling elements. A bolder front end is highlighted by a uniquely-styled grille and very distinctive LED daytime running lights. From the side, the S6 is identifiable by its unique 19-inch wheels, aluminum-look exterior mirrors and V10 badges. A tastefully integrated rear spoiler and four oval exhaust tips bring up the rear.Notable Standard Equipment
The S6's standard equipment list includes a Bose sound system, Audi's MMI(tm) central control system, leather seating, heated front seats, wood trim, sunroof, Bluetooth(r) phone connectivity and adaptive high intensity discharge headlights. Standard safety equipment includes a full complement of front, front side and side-curtain airbags.Notable Optional Equipment
Optional features on the S6 include a DVD-based navigation system, radar-based adaptive cruise control, keyless unlock and start, rear heated seats, rear side airbags, reverse parking sensors and camera, phone/audio/navigation voice control and a solar panel-equipped sunroof that powers the ventilation system to help keep the car cool in hot parking lots.Under the Hood
Like its S8 big brother, the mid-size S6 features a slightly larger, direct-injected version of the V10 engine found in the cars' Lamborghini Gallardo corporate cousin. Combined with a six-speed Tiptronic(r) transmission, the S6 will reach 60 mph in 5.1 seconds on its way to an electronically-limited top speed of 155 mph. Other mechanical highlights include a 40/60 rear-biased quattro all-wheel drive system, along with more aggressive suspension tuning, bigger brakes and a more direct steering ratio than the A6.
435 horsepower @ 6800 rpm
398 lb.-ft. of torque @ 3000-4000 rpm
EPA city/highway fuel economy: 15/21
The 2007 Audi S6 starts at a Manufacturer's Suggested Retail Price (MSRP) of $74,075 and will top $84,000 when fully loaded. Because of limited supply, we expect our Fair Purchase Prices to reflect real-world transaction prices equal to sticker price. BMW M5 pricing ranges from the mid-$80,000 range to about $100,000, and the Mercedez-Benz S63 is slightly above that. As for resale value, we expect the S6 to perform on par with the Mercedes but not quite as well as the BMW.