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Audi RS7 Sportback (4G) 2013-
Aesthetic design, innovative technology and impressive sportiness: The RS 7 Sportback, the large five-door coupe from Audi, combines many strengths to produce a fascinating character. Its strong heart is the 4.0 TFSI, which takes Audi’s downsizing strategy to the high-end category. The twin-turbo V8 displaces 3,993 cc and develops awesome power, with 412 kW (560 hp) available between 5,700 and 6,700 rpm. A constant 700 Nm (516.29 lb-ft) of torque are available between 1,750 and 5,500 rpm.
Because the high-revving four-liter engine has been rigorously designed for low load-change and flow losses, it develops this power quickly and spontaneously. The cylinder heads have the exhaust side on the inside and the intake side on the outside. The two twin-scroll turbochargers, which produce up to 1.2 bars of relative boost pressure, are located together with the intercooler in the inside V of the cylinder banks. Consequently, the gas paths are very short and response very good. The RS-specific engine management and unthrottled intake system also contribute to the dynamic character of the twin-turbo V8. Switchable flaps in the exhaust system make the engine sound even fuller at the push of a button or under strong acceleration. Audi also offers an optional sport exhaust system.
The RS 7 Sportback sprints from 0 to 100 km/h (62.14 mph) in just 3.9 seconds. Audi limits the top speed in the standard configuration to 250 km/h (155.34 mph). Top speed with the optional dynamic package is 280 km/h (173.98 mph) and 305 km/h (189.52 mph) with the dynamic package plus.
Yet the new top model of the model series consumes on average just 9.8 liters of fuel per 100 km (24.00 US mpg). This top value is due in part to the standard start-stop system and innovative thermal management.
The most innovative efficiency technology in the new Audi RS 7 Sportback is the cylinder on demand (COD) system. At low to medium loads and engine speeds, it deactivates cylinders 2, 3, 5 and 8 by closing their valves via electromechanical actuators. The 4.0 TFSI then runs as a four-cylinder engine until the driver accelerates more strongly again. The operating points in the active cylinders are displaced toward higher loads, increasing efficiency.
All of these operations take just a few hundredths of a second and occur so smoothly and quickly that they can hardly be felt or heard. Active engine bearings, another high-end solution from Audi, use out-of-phase counter-oscillations to compensate for the slight vibrations that occur during four-cylinder operation. The COD technology reduces NEDC fuel consumption by roughly five percent, and even greater savings of approximately 10 percent are possible when driving at moderate speeds.
The standard eight-speed tiptronic is specially tuned to the sporty character of the Audi RS 7 Sportback. Drivers can choose between the modes D and S or change gears themselves using the shift paddles on the steering wheel or the selector lever, which sports a unique RS design. While the lower gears of the tiptronic are closely spaced for sporty response, eighth gear is tall like an overdrive to reduce fuel consumption.
The Audi RS 7 Sportback comes standard with quattro permanent all-wheel drive for its decisive advantage in traction and driving safety compared with its two-wheel-drive competitors. At the heart of the quattro system is a center differential with a high locking rate and a separate oil cooler to regulate its temperature. It distributes the power as needed within a wide range between the front and rear axles. In the standard configuration, 60 percent flows to the rear and 40 percent to the front.
An intelligent software solution called torque vectoring supports the work of the differential at the cornering limit with minimal braking of the wheels that are under a reduced load. Audi also offers the optional sport differential for the rear axle, which uses two superposition gears to actively distribute the power between the wheels.
The Audi RS 7 Sportback comes standard with polished, 20-inch forged lightweight wheels in a seven twin-spoke design. The five-door high-performance coupe also rolls on optional 21-inch cast wheels in a choice of three designs.
Powerful brakes are located behind the large wheels. The four internally vented discs feature a weight-saving wave design and measure 390 millimeters (15.35 in) in diameter up front. Pins decouple the steel friction rings from the aluminum brake caps. Black painted six-piston calipers – optionally available in red – grip the discs. Audi also offers optional 420 millimeter (16.54 in) carbon fiber ceramic discs with anthracite gray calipers. The electronic stabilization control (ESC) has a Sport mode and can also be deactivated entirely.
Equipped with the air suspension, which harmonizes perfectly with the dynamic character of a sport coupe, the new RS 7 Sportback is sporty, yet still comfortable. The RS 7 adaptive air suspension lowers the body by 20 millimeters (0.79 in). Adaptive damping, another of the system’s features, adjusts the suspension’s response to the condition of the road, the driver’s style and the mode selected in the Audi drive select system, with which the driver can alter the function of key components in multiple steps.
Audi offers the taut sport suspension plus with dynamic ride control (DRC) as an alternative to the air suspension. It uses steel springs and three-stage adjustable dampers that are connected to one another via diagonal oil lines and a central valve. Another option, which can also be integrated into Audi drive select, is the dynamic steering with its steplessly variable steering boost and ratio. As with the standard electromechanical steering, its characteristics are specially tailored for the RS 7 Sportback.
