Porsche has been spied testing a 911 Turbo prototype that could feature a hybrid powertrain.

This blacked-out 911 Turbo was recently spied near the Nurburgring and for the most part, it looks identical to the current 992-generation car. However, our eagle-eyed spy photographers point out that there is a yellow sticker on the rear window. This sticker is important because it is used by car manufacturers to notify first responders that the cars have electrified powertrains.

While many carmakers use yellow stickers that read ‘Hybrid Test Vehicle,’ Porsche has gone for a more subtle approach with a simple round yellow sticker. What the sticker doesn’t specify is whether the prototype has a mild-hybrid, traditional hybrid, or plug-in hybrid powertrain, but given the lack of a visible charging port, we doubt it’s a plug-in.

Read More: Porsche 911 Turbo Test Car Spotted Hiding New Hybrid Tech

Another aspect of this 911 Turbo prototype that is unique is the fact that the rear side windows have been blacked out. Our photographers claim that Porsche may have done this because there is now a battery pack where the rear seats would usually sit.

Porsche has previously confirmed that it developed the 992 platform to support a hybrid powertrain. In 2020, the German brand said it was still deciding whether the first hybrid 911 would be a performance-oriented hybrid or a range-oriented plug-in hybrid. It appears it has decided on a performance-oriented hybrid that will be even more powerful and quicker than the already extremely fast 911 Turbo S.

Performance details are unclear, but with an electric motor working in tandem with the car’s current 3.8-liter twin-turbocharged flat-six, we think a figure around the 700 hp mark is likely.

Photo Credits: CarPix for CarScoops