What is the ultimate 911? For a time it was the GT3 RS, until this interloper was spotted track testing, Porsche’s next GT2 RS.

It is traditionally a limited run, highly expensive model that pairs the most extreme chassis from a GT3 RS with an even more powerful variant of a turbocharged powertrain. That of course is borrowed from the 911 Turbo S. A wild be-winged prototype of the GT2 RS was spotted testing at the Nurburgring recently.Â
Read our review of the 2019 GT2 RS here.
This particular car sports a new set of prototype wheels and substantial air vents and ducting up front. A wing that wouldn’t look out of place on a small plane graces the rear.

There’s carbon galore, the entire bonnet, for example. So too the roof with longitudinal vanes that direct air to that protruding rear appendage.Â
New 992.2 rear lights are fitted, and a special bumper hides a new exhaust system compared with that on the GT3 RS. The Turbo’s exhaust is larger and wouldn’t fit beneath the GT3 RS bumper.

There are no details on the GT2 RS powertrain, though it is possible that a hybrid system will be fitted, similar to that of the GTS. This houses a small motor within the dual-clutch transmission and another one inside a single large turbo.Â
Expect power to edge up significantly from the 515kW figure of the 2017 GT2 RS. Output closing on 600kW for the 992.2 GT2 RS is likely. And Porsche may wish to go that high before European emissions regulations outlaw such outlandish behaviour.Â

Expect the powertrain to spin the rear wheels only, via an eight-speed dual-clutch transmission. A manual transmission is unlikely with this amount of power.Â
The substantial aero of the prototype, and chassis upgrades are likely to end up on the finished product. And Porsche is almost certain to utilise carbon fibre for most body panels and large parts of the interior. Whether or not exotic items like hydraulically cross-linked dampers or the like are fitted remains to be seen.