Inside, the RS3 uses a mix of leather, Dinamica microfibre and stainless-steel trim. Standard 'Carbon Atlas' inlays highlight the cabin, with optional matt carbon or Dinamica finishes. A steering wheel with a flat bottom and top is standard, along with paddle shifters, tri-zone climate control and ambient lighting. Storage extras include nets, multiple USB points and a luggage pack.

The RS3 runs a 2.5-litre five-cylinder turbo-petrol engine. It produces 294kW between 5600-7000rpm and 500Nm from 2250-5600rpm. This is mated to a seven-speed dual-clutch automatic with drive sent through an all-wheel-drive system.

The 2026 Audi RS3 Sportback and RS3 Sedan reach 100 km/h in 3.8 seconds. Top speed is electronically limited to 250 km/h.

All 2026 Audi RS3 models include a 12.3-inch digital instrument cluster, 10.1-inch touchscreen multimedia system with satellite navigation, wireless Apple CarPlay and Android Auto and digital radio as well as a head-up display. A panoramic glass sunroof, keyless entry, privacy glass and an powered tailgate (electric opening boot lid for sedan) are also standard. Safety tech includes adaptive cruise control, lane-keep assist, blind-spot monitoring (with exit warning) and a surround-view camera. Buyers can add RS design packages in red or green, among other option bundles.

The 2026 Audi RS3 has sport front seats with integrated headrests, side bolsters and fine Nappa leather trim. RS embossing and honeycomb stitching are standard. The front seats are power adjustable with memory for the driver, plus heating and lumbar with massage. The rear bench splits 40/20/40 with a fold-down armrest including cupholders.

The 2026 Audi RS3 Sportback uses 8.3L/100km on the combined (urban/extra-urban) cycle, while the Sedan records 8.2L/100km. Both versions have a 55-litre fuel tank, so range is around 660km and 670km, respectively.