We’ve seen that Porsche is already testing the facelifted 2020 Panamera but we can now show you an intriguing prototype based on the Panamera Turbo.

Porsche’s latest test car features no camouflage but sports some extra aerodynamic parts and produces a “crazy” sound according to our photographers, who spotted it at the Nurburgring (where else?).

The most obvious change over the stock Panamera Turbo is the massive rear spoiler with a Gurney flap, but the prototype also features two extra winglets on each side of the front bumper and a lower front splitter. The package also includes huge ceramic brakes, hinting at some serious performance.

The winglets and Gurney flap allow Porsche to test with more downforce without revealing the real look of the bigger spoilers.

According to one of our photographers who talked to someone involved in the project, Porsche is testing an extreme version of the current Panamera Turbo with around 820 horsepower. It could be a track-focused, special edition model that would allow the second-generation Panamera to go out with a bang when production ends sometime in 2022.

For now, the project is at a very early stage of development and the team is testing to see how far they can push the envelope with the Panamera Turbo. At the moment, the most powerful Panamera on sale is the Panamera Turbo S E-Hybrid which delivers a total of 680 PS (671 hp) and 850 Nm (626 lb-ft) of torque.

Also read: Porsche’s Panamera Is Celebrating Its 10-Year Anniversary

The plug-in hybrid model is able to sprint from 0 to 100 km/h (62 mph) in 3.4 seconds and hit a top speed of top speed of 310 km/h (193 mph). Those are insane performance figures for a car this size and yet Porsche wants more. It probably wouldn’t be Porsche if it didn’t.

Photo credits: S. Baldauf/SB-Medien & CarPix for Carscoops