As it is, the Porsche 911 GT3 RS represents the climax of the development of the 911 for road use before the sports car maker turns its attention to the creation of performance-laden race cars just for the tracks. This newest offering from Porsche is the latest of the ingenuous sporting derivatives of the 911 homologated to be used on the road, especially by drivers having motorsport dreams.
The new 911 GT3 RS is in fact a high performance road-going machine – offering more power, lower weight, shorter transmission ratios as well as uprated body and suspension elements when compared to the 911 GT3. Moreover, Porsche has developed the new 911 GT3 RS as the homologation model for the racing variant of the 911 GT3.
It is powered by a 3.8-liter six-cylinder horizontally-opposed engine that develops up to 450 bhp (331 kW) of output and up to 430 Nm/317 lb.-ft. of torque at 6,750 rpm. Mated to a six-speed manual transmission, this powerplant is allowing the new 911 GT3 RS to accelerate from zero to 100 km/h in just 4.0 seconds and reach a top speed of 310 km/h (192 mph).
With a DIN unladen weight of 1,370 kg (3,021 lbs, the new 911 GT3 RS consumes just 13.2 liters of fuel per 100 kilometers (equal to 21.4 mpg imp) per NEDC driving cycle. Interestingly, the six-cylinder engine that powers the Porsche 911 GT3 RS is derived from the tested components found on the powerplant of the current 911 GT3.
Boasting of a larger engine capacity compared to the previous model (from 3.6 liters to 3.8 liters), the engine of the 911 GT3 RS features titanium connecting rods, dry sump lubrication with an external engine oil tank as well as a variable intake system with two resonance flaps.
Moreover, this engine features upgraded VarioCam valve control with small cup tappets that could operate at high engine speeds and a sports exhaust system with lower counter-pressure. Porsche also took effort to optimize the six-cylinder power sans any compromise in terms of its agility and free-revving qualities.
For instance, Porsche employed a single-mass flywheel to allow the six-cylinder engine to rev up faster, thereby generating the much needed power for fast acceleration. In fact, this high-speed engine could rev by up to 8,500 rpm.
This single-mass flywheel on the Porsche 911 GT3 RS is around 1.4 kilos lighter than that of the previous model and is approximately over 8 kg (17.5 lbs) lighter than the two-mass flywheel on the 911 GT3. Porsche also used short transmission ratios to improve the actual performance of the Porsche 911 GT3 RS.
Thanks to an enhanced air filter and intake manifold reducing flow resistance (plus 20 percent), the engine in the 911 GT3 RS is around 15 bhp more powerful than the powerplant in the 911 GT3. The engine features an output per liter of over 118 bhp, which means it boasts of having the highest specific power output among all naturally-aspirated power plants developed for a car homologated for the road.
Just like on the current 911 GT3, the engine of the new 911 GT3 RS could be switched into a higher performance mode just by a simple push of the Sports Button on the center console. This button results to higher available torque at medium engine speeds (by up to 35 Nm/26 lb.-ft.) – achieved by lowering the exhaust gas counter-pressure in the sports exhaust system and improving the charge cycle provided in this manner.
All of these sporty dynamics is perfectly conveyed by an exterior appearance that indicates close links to motorsport -- low suspension, new large rear wing made from carbon-fiber with aluminum supports, and a custom-built front and rear sections. Moreover, the 911 GT3 RS features central bolts on the wheels, titanium dual tailpipe and titanium rear muffler.