Performance on the level of a supercar and complete composure: The Audi RS 7 Sportback is a high-performance athlete. The large, five-door coupé sprints from 0 to 100 km/h (62.14 mph) in just 3.9 seconds. In the standard configuration, top speed is a governed 250 km/h (155.34 mph). Audi will raise this upon request. The dynamic package allows 280 km/h (173.98 mph), while top speed with the dynamic package plus is 305 km/h (189.52 mph). Despite this superior performance, the Audi RS 7 Sportback consumes on average just 9.8 liters of fuel per 100 kilometers (24.00 US mpg).
The 4.0 TFSI that powers the RS 7 Sportback takes Audi's downsizing strategy to the high-performance class. The biturbo V8 develops prodigious power from a displacement of 3,993 cc (bore x stroke 84.5 x 89.0 millimeters [3.33 x 3.50 in]). Its peak output of 412 kW (560 hp) is available between 5,700 and 6,600 rpm; peak torque of 700 Nm (516.28 lb-ft) is already available at 1,750 rpm and remains constant through 5,500 rpm.
Numerous details document the high-tech character of the turbocharged V8. The aluminum-silicon crankcase is manufactured in a low-pressure permanent mold casting process, which ensures a high level of material uniformity. A frame for the bottom bearing bridges of the crankshaft further enhances its rigidity. The engine is only 497 millimeters (19.57 in) long; the chains run on the rear side to save space. Its weight, with all of its key add-on components, is 224 kilograms (493.84 lb).
The intake system is optimized for minimal flow losses. Switchable flaps in the intake ports induce a rolling type of movement in the incoming air. Depending on their position, they optimize either filling of the combustion chamber or combustion itself. The directly injected and intensively swirled fuel cools the combustion chambers. This allows a high compression ratio of 10.1:1.
The cylinder heads have the intake side on the outside and the exhaust side on the inside. This sophisticated concept enables short gas pathways with minimal flow losses and spontaneous response. The two large turbochargers and their air-water intercoolers are located in the 90° inside V of the cylinder banks. Elaborate insulation of hot components ensures thermally stable conditions.
The two turbochargers generate up to 1.2 bar of relative charging pressure. The so-called twin-scroll technology, in which the exhaust from two cylinders each flows to the turbine wheel via separate ports, prevents undesired interactions between the gas flows. This results in the early and steep torque build-up.
Sound flaps in the RS exhaust system give the V8 an even more voluminous sound. They are controlled independently from engine load and speed, the mode in the Audi drive select dynamics system and the eight-speed tiptronic’s operating mode. An RS sport exhaust system with black tailpipe tips and a more distinctive sound is available as an option.
Modular efficiency platform: Innovative technologies
The biturbo V8 features the potent technologies from Audi’s modular efficiency platform. The start-stop system deactivates the engine when stopped; the innovative thermal management uses a ball valve to regulate the flow of coolant so that the oil warms up as quickly as possible after the engine is started. The regulated oil pump varies the oil pressure as needed, and the piston oil injection nozzles are map-controlled. Multiple high-end technologies are used during assembly of the V8 at the Audi plant in Györ, Hungary. For example, the piston pins have a fine, diamond-like carbon (DLC) coating.
One pioneering innovation from Audi is the cylinder on demand system (COD). At low to moderate engine speed and load – up to around 3,500 rpm and 250 Nm (184.39 lb-ft) – the COD technology deactivates cylinders two, three, five and eight by closing the valves and stopping fuel injection to them and ignition. Efficiency in the active cylinders is increased because the operating points are displaced toward higher loads.
This changeover takes place within a few hundredths of a seconds and so smoothly that the driver practically only recognizes four-cylinder operation by the message in the instrument cluster display. The cylinders are reactivated as soon as the driver firmly presses the accelerator. The COD technology reduces the Audi RS 7 Sportback's NEDC fuel consumption by around five percent; at a constant 100 km/h (62.14 mph) the reduction is around 10 percent.
While the V8 is temporarily running as a V4, ignition only takes place at every 180 degrees of crankshaft angle and the engine's torsional vibrations are correspondingly higher. Active engine mounts use electromagnetic oscillation coil actuators to induce phase-offset counter oscillations that largely cancel engine vibration.
Audi RS 7 Sportback: The 4.0 TFSI
84.5/89.0 (3.33/3.5 in)
Power output kW (hp)
412 (560) between 5,700 and 6,600 rpm
700 (516.29 lb-ft) from 1,750 to 5,500 rpm
The equipment and data specified in this document refer to the model range offered in Germany. Subject to change without notice; errors and omissions excepted.