The new Audi RS3 sedan has been spied doing testing on the Nurburgring Nordschleife.

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These first spy photos of the RS3 sedan provide further proof that Audi is working on a new range-topping variant for its smallest sedan.

In February, images leaked out from the private Audi Summit event, showing what appeared to be a production ready RS3 sedan.

Like the car in the leaked images, this prototype features a honeycomb grille and the facelifted A3's stepped headlights. Although there's a disguise over the lower air intakes, the design of the front spoiler mirrors that of the leaked vehicle.

Other changes include two large oval exhaust tips, a new rear bumper design, and flared side sills.

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Under the skin, RS3 sedan could feature the same drivetrain as the current RS3 Sportback hatch, which utilises a 270kW/465Nm 2.5-litre turbocharged five-cylinder engine.

Rumour has it, though, that the sedan might feature the same 2.5-litre turbo used in the TT-RS coupe and convertible, which both have 294kW of power and 480Nm of torque at their disposal.

Regardless of the engine used, all-wheel-drive and a seven-speed dual-clutch transmission will be standard.

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If the RS3 sedan does indeed utilise the TT-RS' engine, the 0-100km/h time could drop from the Sportback's 4.3 seconds to something closer to four seconds flat. The unrestricted top speed will likely still be around the 280km/h mark.

Australia

The RS3 sedan is expected to debut later this year, meaning that an Australian launch won't take place until 2017.