The current generation Audi RS6 has been on sale since 2019 (2020 model year in the US) and according to a recent report, the German company could be working on a more extreme version of the performance wagon. The RS6 with the internal designation C8 has always been available only with a long-roof body though, leaving the brand with no direct competitor against the BMW M5. At least officially as there’s finally an RS6 Sedan now.
Obviously, it doesn’t come straight from the factory. The car you see featured in the video at the top of this page and depicted in the gallery below (thanks, Auditography!) started its life as an A6 Sedan with a 3.0-liter TFSI engine but Ado X Performance from Germany turned it into a full-blown RS6 Sedan with the required exterior, interior, and engine upgrades. In fact, it is now significantly more powerful than a stock RS6.