As the Euro 6d emission standard comes into effect in January 2021, Audi is replacing the V8 diesel engine found in current SQ7 and SQ8 models with a new petrol V8 TFSI engine for the 2021 Model Year.
The 4.0 TFSI
Essentially a detuned version of the engine found in the RS Q8, the 4.0-litre TFSI petrol engine produces 373 kW (507 PS) and 770 Nm (567.9 lb-ft) of torque. Coupled to a ZF 8HP 8-speed automatic transmission, it propels the heavy crossovers / SUVs from zero to 100 km/h in 4.1 seconds. Depending on the equipment, the vehicles consume between 12.1 and 12.0 liters of fuel per 100 kilometers (19.4 – 19.6 US mpg).
The cylinder on demand (COD) system temporarily deactivates four cylinders during moderate driving, thus reducing fuel consumption. The two twin-scroll turbochargers reduce back pressure and optimize gas exchange for improved filling of the combustion chambers. Their hot-vee configuration results in short gas paths and spontaneous response even at low rpm. In the exhaust system, two mode-controlled actuators modulate the eight-cylinder sound.
Chassis & Suspension
The Audi SQ7 and SQ8 come standard with all-wheel steering and adaptive air suspension sport with controlled dampers. At low speeds, the rear wheels turn by as much as 5 degrees in the opposite direction, which improves agility and reduces the turning circle. At speeds of 60 km/h (37.3 mph) and above, they turn slightly in the same direction for improved stability at higher speeds and during fast changes of direction.
The advanced suspension package includes another highly effective module: electro-mechanical active roll stabilization (eAWS). When driving straight ahead, the system actuates the stabilizers via electric motors, providing a high level of ride comfort. It also reduces roll during fast cornering. This package also includes the sport differential, which shifts torque between the rear wheels as needed during fast cornering. Handling is even more agile and precise as a result.
The electronic chassis platform (ECP) is the central controller that interconnects most of the controlled chassis systems. Drivers experience this close interaction as maximum handling precision. They can choose between seven driver profiles in the Audi drive select system: comfort, auto, dynamic, efficiency, allroad, offroad and individual.
The Audi SQ7 comes standard with 20-inch wheels, with wheels up to 22 inches optionally available. With the SQ8, the standard size is 21 inches with 22- and 23-inch wheels optional. Both cars feature front brake discs measuring 400 millimeters (15.7 in) in diameter. Carbon fiber ceramic brakes are also available.