Porsche has chosen the 2017 Goodwood Festival of Speed for the public unveiling of the most powerful street-legal 911 of all time. Powered by a 3.8-litre twin-turbo flat-six engine delivering a staggering 515kW of power and 750Nm of torque, the new 911 GT2 RS will accelerate from 0-100km/h in 2.8 seconds, on its way to a top speed of 340km/h.
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The 3.8-litre flat-six trumps the 3.6-litre unit of its predecessor by 59kW and 50Nm. Weighing in at just 1470kg - with a full tank of fuel - the lightweight two-seater is, in the GT2 tradition, rear-wheel drive only. The increase in performance over the 911 Turbo S engine, on which the GT2 RS engine is based, is mainly thanks to larger turbochargers.

A new additional cooling system delivers the best performance possible under peak loads, and at very high intake temperatures, sprays the charge-air cooler with water. Despite the ballistic performance and power on offer, the 911 GT2 RS uses only 11.8L/100km on the combined cycle.

The 911 GT2 RS gets a customised GT seven-speed double clutch transmission (PDK) which enables power to be transferred as smoothly as possible. There's a specifically designed exhaust system - made from titanium for its extra light weight - which weighs in seven kilograms less than the system used in the 911 Turbo. Porsche says it "delivers an emotional sound without precedent".

Keeping the GT2 RS on the tarmac is rear-wheel steering and ultra high performance tyres. It also gets specially-calibrated Porsche Stability management (PSm) with a Sport mode tailored to provide optimal driving dynamics. Specially-designed air intakes and the race-spec rear wing ensure the best in available downforce and aerodynamic advantage.

Up front, the GT2 RS rolls on 265/35/ZR20 tyres, while the rear is shod with whopping 325/30/ZR21 rubber. Porsche promises prodigious grip and performance at the limit. It also features Porsche's Ceramic Opposite Brakes as standard while the front quarter panels, wheel housing vents, outer shells on the exterior mirrors, air intakes on the rear side and parts of the rear end are all made from carbon-fibre-reinforced plastic.

That material also extends to many of the interior components. The bonnet is also made from carbon-fibre to assist with keeping overall weight as low as possible. The roof is made from magnesium.

For buyers keen to spend even more money on their ultra rare GT2 RS, an optional 'Weissach' package will be available. Offering a 30-kilogram weight saving over the standard car, the package includes additional carbon-fibre reinforced plastic and titanium components. The roof and anti roll bars are fashioned out of carbon-fibre, along with the coupling rods on both axles. Magnesium wheels reduce weight even further, while the luggage compartment lid and the carbon weave-finish roof get special trim.

Bespoke touches extend to the cabin of the new GT2 RS as well. It's signified by red alcantara, black leather and carbon weave trim pieces. The steering wheel is backed by gearshift paddles, while full bucket seats are included with a carbon weave finish.

The Porsche Communication Management (PCM) infotainment system is fitted as standard, and is the central control for audio, satellite navigation and communication functions. Connect Plus and Porsche Track Precision apps are also included as standard. Meanwhile, the optional Chrono package expands the PCM functions to include performance display; which be used to show, save and evaluate track times. The package also includes a stopwatch on the switch panel with both analogue and digital displays. There's also a lap trigger as part of the system and it allows drivers to record lap times with a high level of precision.

Porsche is also celebrating the release of this high performance model with a special-issue watch. The watch will be exclusively available to owners of the new car and can only be ordered in conjunction with the new GT model.

"Australia is an enthusiast's market and we tend to sell a high number of the high-performance 911 models," Paul Ellis, director of public relations and motorsport for Porsche Cars Australia, told CarAdvice at the Goodwood Festival of Speed.

"We expect that to continue with the GT2 RS and initial enquiries have been very positive with firm orders in place even before we've announced details and pricing of the car. We expect that there will be strong demand for the GT2 RS in Australia and given what's happening with GT3 and previous GT3 RS, it really is no surprise that the GT2 RS is generating so much interest."

Available now for order from Porsche Centres in Australia, the 911 GT2 RS is priced from $645,700 before on-road costs, with local deliveries expected to commence in early-2018. Pricing for the optional Weissach package and bespoke Porsche Design 911 GT2 RS Chronograph are still to be confirmed.