The Audi S8 is the supreme athlete in the luxury class. With its combination of 10-cylinder FSI power, permanent and particularly sporty quattro four-wheel drive, and Audi Space Frame, the Audi S8 occupies a unique position within its competitive field of high-performance sedans. The outstanding potential of the 10-cylinder powerpack finds its counterpart in the dynamically tuned sports suspension, high-performance brake system and sporty yet elegant design.
Sports appeal is firmly anchored in the genetic code of the Audi brand. In the case of the S models, however, sportiness is a declared principle, combined with comfort, aesthetics, elegance and uncompromising quality. The Audi S8 with its 5.2-liter V10 FSI engine combines all of these strengths to produce passion and superiority.
A 10-cylinder engine is the ideal design for sporting aspirations. Although an eight-cylinder engine would be even more compact, to make it into the five-liter class would require large, heavy pistons and connecting rods, which would impair its ability to rev freely. It is no coincidence that competitors generally have concentrated simply on high torque with their large-capacity V8 engines, rather than attempting to squeeze sporty performance out of them, too.
Other advantages of the high-speed V10 design are quite clear. The engine fascinates with its spontaneous response and short reaction times. It produces a throaty sound when accelerating and yet has a beefy torque curve even at low speeds. All in all it forms the perfect synthesis of sporty driving enjoyment and comfort on long journeys.
The 450 hp V10 in the Audi S8 also belongs to the new generation of V engines from Audi, all of which feature a standard 90-degree angle. The crankcase of the Audi 10-cylinder powerpack is made from an aluminum alloy. This technology renders separate cylinder liners superfluous; the liners are instead honed directly from the material by exposing hard silicon crystals. The connecting rods are made from forged steel and the pistons from an aluminum alloy.
The V10 in the Audi S8 uses FSI gasoline direct injection, which has impressively demonstrated its dynamic potential in motor sport. The R8 racing car featuring this technology represented Audi five times at the 24-hour Le Mans race and captured four victories. The common rail injection system delivers the fuel directly to the combustion chambers in precisely metered amounts.
The powerful 10-cylinder engine has been optimized for high torque as well as high engine power. From as low as 3,000 to 4,000 rpm it delivers 398 ft. lbs. to the crankshaft. More than 90 percent of the torque is available at 2,300 rpm. The V10 imparts the luxury sedan with the road performance of a high-caliber sports car. The Audi S8 sprints from a standstill to 60 mph in 4.9 seconds. Only a short while later it reaches its governed top speed of 155 mph, also facilitated by its low drag coefficient.
The Audi S8 also adds various specific accents to the luxurious interior. The Audi S8 sports seats, which have a wide range of adjustment features, have two-color upholstery with stitching in a contrasting color. The color combinations underscore the ambience of luxurious sportiness. Other interior details distinguish the sporty top model from the A8. The highly-polished door sill trims bear S8 badges, and the inlays on the door and center console are made of Vavona Gray wood or carbon fiber. The three-spoke multifunction steering wheel features color-contrasting stitching and aluminum-look paddles as well as an S8 badge.
Source: Audi press