Audi is putting the final touches on the new 2020 RS7 Sportback, with the test cars now going through some cold-weather testing near the Arctic Circle.

We have already seen prototypes doing some laps at the Nurburgring, as well as driving on public roads, with the latest spyshots showing us Audi testing the new RS7 alongside the also upcoming RS Q8.

The test car still wears a set of contemporary black alloy wheels that reveal a set of massive brakes. The body also features slightly wider fenders to house the bigger wheels, as well as deeper side sills and new front and rear fascias. The biggest telltale remains of course the dual oval exhaust tailpipes.

We still can’t tell for sure which powertrain Audi is going to employ in the 2020 RS7; the German carmaker will most likely use the same twin-turbo 4.0-liter V8 that’s also found in models like the Porsche Panamera Turbo and Lamborghini Urus, with the power output to be set at over 600hp. If that’s the case, then an eight-speed automatic trasmission will be tasked with sending the colossal power to all four wheels to the upgraded Quattro all-wheel drive system.

The most powerful version of the previous RS7 was the Performance version that offered 597hp (605PS) out of its twin-turbo 4.0-liter V8.

Some rumors talk about the new Audi RS7 using the plug-in hybrid powertrain from the Panamera Turbo S, which in the Porsche’s case makes 670hp. If we had to pick which of the two powertrain options is the most likely to happen, we would go for the non-hybrid 4.0-liter V8 one, at least for the early models.

Expect the new Audi RS7 to offer a 0-62mph (100km/h) in around 3.5 seconds once it arrives in the market in late 2019, reigniting the war with the Mercedes-AMG E63S and the BMW M5.

The interior of the new Audi RS7 will be spiced up with Audi Sport’s usual treatment, meaning body-hugging seats, carbon-fiber trim, metal detailing and a combination of leather and alcantara complimenting a screen-infested interior that’s already been praised for its ambience.

Image credits: CarPix | S. Baldauf/SB-Medien for CarScoops