The 4.0 TFSI in the Audi RS 7 Sportback (combined fuel consumption in l/100 km: 11.6 – 11.4 (20.3 – 20.6 US mpg); combined CO2 emissions in g/km: 265 – 261 (426.5 – 420.0 g/mi)) delivers 441 kW (600 metric hp) and a constant 800 Nm (590 lb-ft) of torque across a wide engine speed range from 2,050 to 4,500 rpm. The high performance Sportcoupé will sprint from 0 to 100 km/h (0 to 62.1 mph) in only 3.6 seconds. It will continue to 200 km/h (124.3 mph) in just 12 seconds. The top speed is electronically limited to 250 km/h (155.3 mph). The optional dynamic package increases the top speed to 280 km/h (174.0 mph) or even up to 305 km/h (189.5 mph) with the RS dynamic package plus.
Audi RS 7 Sportback
Displacement in cc
Max. power output
in kW (metric hp) at rpm
441 (600) at 6,000–6,250
Max. torque in Nm (lb-ft) at rpm
800 (590.0) at 2,050–4,500
Top speed in km/h (mph)
250 (280/305) (155.3 (174.0/189.5))
Acceleration 0–100 km/h (62.1 mph) in s
Fuel consumption (combined) in l/100 km
11.6 – 11.4 (20.3 – 20.6 US mpg)
Combined CO2 emissions in g/km (g/mi)
265 – 261 (426.5 – 420.0 g/mi)
permanent all-wheel drive quattro
The twin-turbo V8 engine has a conventional 90-degree bank angle and a displacement of 3,996 cc (bore x stroke: 86.0 x 86.0 millimeters (3.4 in x 3.4 in)). Its crankcase is made of cast aluminum and weights just 39.1 kilograms (86.2 lb). The cylinder linings have been machined with the aid of atmospheric plasma spraying. This method involves applying an extremely thin iron coating to the cylinder linings. These coated cylinder linings improve heat dissipation, thermal and mechanical resilience and wear resistance. They also significantly reduce internal friction and oil consumption. An electronic valve arranged centrally in the inside V also regulates the map-controlled piston spray nozzles as required for piston cooling.
A fully variable pump drives the oil circuit. It is split into two separate oil galleries—one for the engine block and one for the cylinder heads. This layout ensures a reliable supply of oil even under the extreme lateral and longitudinal acceleration that the Audi RS 7 Sportback is capable of achieving. The variable water pump is only activated at 80 degrees Celsius so that the non-flowing coolant heats up quickly. The chains of the valve gear are driven by a geared intermediate shaft. This also drives the water pump. To ensure that the cylinders are filled properly at all times, intake and exhaust camshafts can be adjusted by
50 degrees. Each cylinder bank drives a high-pressure fuel pump that builds up pressure of up to 250 bar. The injectors, located in the center of the combustion chamber, inject the fuel through seven holes, following special injection strategies depending on the requirements, from cold start to full load. The firing order is identical to that of the predecessor engine: 1-3-7-2-6-5-4-8.
Powerful: the two twin-scroll turbochargers
The immense torque that the 4.0 TFSI produces even at low engine speeds and the extra 29 kW (40 metric hp) of output are all thanks to the two twin-scroll turbochargers.
In addition to elevated boost pressure, the diameter of the compressor wheel in the turbocharger has been increased by 3 millimeters (0.1 in). Each turbo supplies a cylinder bank with up to 1.4 (relative) bar of boost pressure—0.2 bar more than in the predecessor model. The higher boost pressure improves the volumetric efficiency of the cylinders, making more air available for fuel combustion. This results in higher engine power and improved efficiency. The cylinder heads have the intake side on the outside and the exhaust side on the inside. The larger turbos and their optimized air-to-air heat exchanger are located in the inside V of the cylinder banks rather than in the usual location outside next to the crankcase. This layout enables short gas flow paths with minimal flow losses and spontaneous engine response. Elaborate and effective insulation of hot components ensures thermally stable conditions in the inside V. The compression ratio
Efficient systems: mild-hybrid and cylinder on demand (COD)
Thanks to its mild-hybrid system (MHEV) with a 48-volt main on-board electrical system, the 4.0 TFSI combines strong performance with high efficiency. The belt alternator starter can recover up to 12 kW of power under gentle acceleration and feed it into a lithium-ion battery as energy. If the driver releases the accelerator at a speed between 55 and 160 km/h (34.2 to 99.4 mph), the drive management will select one of two options. Depending on the driving situation and the settings in Audi drive select, the RS 7 Sportback will either recover energy or glide with the engine switched off. When the driver steps on the accelerator, the belt alternator starter will start the engine again. MHEV technology allows for start/stop operation at a speed of up to 22 km/h (13.7 mph). In everyday driving, it is possible to achieve fuel savings of up to 0.8 liters per 100 kilometers.