The inevitable is nigh. The next-generation Porsche 911 GT3 could receive a twin-turbocharged petrol engine, sources close to the automaker told Autocar. The move, while not officially confirmed by Porsche, would bring the 2020 911 GT3 and the GT3 RS in-line with the upcoming 992-series 911 line-up, which have been earmarked to receive updated versions of the 3.0 litre and 3.8 litre turbocharged engines.

According to a Stuttgart-based source, who has direct links to Porsche Motorsport, the 911 GT3 could get a heavily reworked version of the 911 Turbo‘s existing 3.8 litre twin-turbocharged Boxer engine. The flat-six petrol mill currently packs 540 hp in the Turbo and 580 hp in the Turbo S.

The existing 911 GT3 features a 4.0 litre naturally aspirated flat-six developing 500 hp and 460 Nm of torque, but the new downsized twin-turbo engine could bring it up to 520 hp, as well as a massive spike in torque. Comparatively, the blown 3.8 litre flat-six in the Turbo makes 660 Nm of torque, and up to 710 Nm with overboost.

Last December, Porsche CEO Oliver Blume said the next-generation 911 line-up will feature plug-in hybrid technology, stating that “it will be very important for the 911 to have a plug-in hybrid.” While the new 911 is set to go on sale in 2019, the PHEV model will only be introduced during its mid-cycle update, which is around 2023.

There’s not much to go about this, but Blume is aiming to integrate a battery system in the plug-in 911 that provides an all-electric range of 69 km. Porsche engineers are presently developing next-generation battery technology to be used in all its cars. As Blume puts it, “the potential is very good with the new generation of batteries.”

Autocar however, said the petrol-electric 911 could get a turbocharged 3.0 litre flat-six engine that’s married to a 70 kW (95 hp) electric motor for a combined output of around 484 hp. The electric motor is rumoured to be juiced by a 11 kWh lithium-ion battery. Whether or not this is true remains to be seen.

GALLERY: 992-generation Porsche 911 spyshot