The Koenigsegg Agera RS was unveiled at the 2015 Geneva Motor Show, along with the prototype version of the Koenigsegg Regera. The Agera RS is an advanced version of the Agera R, implementing some of the new technology and features of the One:1 and combining the features of the Agera R and the Agera S.  Koenigsegg billed it as "the ultimate track tool" due to its lightweight features and track optimized technologies. The Agera RS produces 450 kg of downforce at 250 km/h. The 5.0 litre V8 engine now produces 865 kW (1,160 hp) on regular pump gasoline. The optional 1 MegaWatt package increases the engine's power to 1,000 kW (1,341 bhp). The Agera RS is limited to 25 units. Each Agera RS can be fully customized by its owner. Some customized versions of the Agera RS include: Agera RS Draken, Agera XS, Agera RS Gryphon, Agera RSR, Agera RS Naraya, Agera RS1, and Agera RS ML.
The Koenigsegg Agera RS has a power to weight ratio of 1.19 kg (2.62 lb) per horsepower.