Even if the previous RS4 Avant offered the same power and torque as the 2020 model year, Audi fitted the newer version with a gasoline particulate filter and a twin-turbo V6 unit.
In January 2021, all new cars had to fit in the Euro 6d norms, and that was a problem for most car-makers, especially those who had more powerful vehicles. The new standards were tighter and imposed new safety features and lower emissions.

Along with the technical upgrades, Audi refreshed the exterior look of the RS4 Avant. The new headlights showed a different style, especially on their lower side. The singleframe grille design was extended to the lower part of the bumper, and a pair of air-scoops channeled the air-flow to the front discs and intercoolers. The marketing department added the option of badge deletion so that the RS4 could become a real sleeper.

The interior design offered a new perspective for the driver with a new Audi Virtual Cockpit design and a new 10.1” infotainment touch-screen for the MMI system. The LED doors contour amplified the look of the black-only interior. Audi fit more safety features to the car than the Euro 6d norms requested.

The powerplant was the biggest innovation. Instead of the older, 4.2-liter V8, the engineers installed a 2.9-liter V6 engine that offered 450 hp. It was paired as standard to a 9-speed automatic transmission, and, as usual, it sent the power in all corners via a Torsen center differential.