According to Autocar sources, early prototype versions of the 911 GT2 RS’s engine achieved four-figure outputs on the test bench – albeit in development trim.
The strongest indication of Porsche’s hybrid direction comes from the new 911 GTS T-Hybrid, which combines a 3.6-litre flat six with a single electric turbocharger and a gearbox-mounted electric motor for a total of 534bhp. That car effectively previews the hybrid technology that will be deployed across the facelifted 992-series 911 line-up, including the upcoming 911 Turbo and 911 Turbo S. The 911 GT2 and even more extreme 911 GT2 RS will use a similar formula, but with an even greater output.
The exact capacity of the 911 GT2 RS’s engine remains under wraps, though it is claimed to be paired with a hybrid system incorporating two electric turbochargers and a higher-output electric motor than that used by the 911 GTS T-Hybrid. Power output is expected to reach at least 750bhp, potentially more, depending on weight, cooling and thermal efficiency. Torque, meanwhile, looks set to exceed the 590lb ft of the latest 911 Turbo S.
For comparison, the previous-generation 991-series 911 GT2 RS developed 690bhp and 553lb ft from its twin-turbocharged 3.8-litre flat-six engine.
The switch to petrol-electric hybrid power promises to increase weight beyond the previous 911 GT2 RS’s 1470kg. The 911 GTS T-Hybrid adds around 60kg and the new 911 GT2 RS is likely to carry more still, despite forgoing plug-in charging hardware.