Porsche 911 GT3 RS 4.0 - Legends Explained Part.1
Quick Answers
- What is the Porsche 911 GT3 RS 4.0? – It is a limited-edition, performance-focused version of the Porsche 997.2 generation 911 GT3 RS, distinguished by its 4.0-liter Mezger flat-six engine.
- When was it produced? – Porsche announced the 911 GT3 RS 4.0 in April 2011. Production and deliveries took place later that year, classifying it as a 2011 model year vehicle.
- How many were made? – Production was limited to 600 units for worldwide distribution.
- What are key features of the GT3 RS 4.0? – Its 4.0-liter Mezger flat-six engine, a 6-speed manual transmission, specific aerodynamic elements, lightweight construction materials, its limited production volume, and its characteristic driving dynamics.
- Is the GT3 RS 4.0 naturally aspirated? – Yes, it is powered by a naturally aspirated 4.0-liter flat-six engine.
Context and Development
The 911 GT3 RS 4.0 was developed as a concluding iteration of the Mezger flat-six engine in a naturally aspirated, road-legal 911 model within the 997 generation. This engine design, attributed to Hans Mezger, had been utilized in various Porsche racing cars, including the 911 GT1. For the 4.0, Porsche incorporated elements and engineering insights from its 911 GT3 RSR racing program. The car was planned from its inception as a limited-run model aimed at a specific segment of Porsche clientele.
The 4.0-Liter Mezger Engine
The engine is a central component of the GT3 RS 4.0. It is a naturally aspirated flat-six with a displacement of 3,996 cc (4.0 liters), producing 500 PS (368 kW; 493 hp) at 8,250 rpm and 460 Nm (339 lb-ft) of torque at 5,750 rpm. At the time of its release, this power output made it one of the highest specific output naturally aspirated engines in a production car. The engine's construction includes the crankshaft from the 911 GT3 RSR race car, titanium connecting rods, and forged pistons. It features dry-sump lubrication with an external oil tank and Porsche's Variocam variable valve timing system. The engine operates up to an 8,500 rpm redline and produces a sound characteristic of this type of flat-six unit. Power is delivered to the rear wheels exclusively through a 6-speed manual gearbox, selected to enhance driver interaction with the vehicle.
Design, Aerodynamics, and Lightweight Construction
The exterior design of the GT3 RS 4.0 builds upon the 997.2 GT3 RS body, with added aerodynamic features and attention to weight reduction. It was the first production Porsche to incorporate lateral front air deflection vanes, known as flics, on the front bumper. These operate in conjunction with an adjustable carbon fiber rear wing, equipped with a Gurney flap, to increase downforce; Porsche stated a figure of 190 kg (419 lbs) at the car's top speed. Weight reduction was addressed through the use of materials such as carbon fiber for the hood, front fenders, and the shells of the bucket seats. Polycarbonate was utilized for the rear and side-rear windows in many units. Options such as air conditioning and the radio system could be omitted by customers to further reduce weight, though many vehicles were specified with these features. These measures contributed to a curb weight of approximately 1,360 kg (2,998 lbs) with a full tank of fuel. The car was typically finished in Carrara White as standard, with specific silver and red graphics and "RS 4.0" badging.
Chassis, Suspension, and Handling
The chassis and suspension systems of the GT3 RS 4.0 were configured for track use and to provide direct feedback to the driver. The suspension architecture is based on the GT3 RS, with McPherson struts at the front and a multi-link LSA rear axle. Components derived from Porsche's motorsport activities, including rose-jointed (uniball) suspension links, were incorporated to increase precision. Porsche Active Suspension Management (PASM) was standard, with settings adapted for the 4.0. Braking was managed by Porsche Ceramic Composite Brakes (PCCB) as standard equipment. The car was fitted with center-locking alloy wheels, 9 inches wide at the front and 12 inches wide at the rear, typically equipped with Michelin Pilot Sport Cup tires or similar ultra-high-performance tires. The hydraulic power-assisted steering was designed to offer direct feedback. These components contribute to a driving experience noted by reviewers for its responsiveness and handling precision. A Nürburgring Nordschleife lap time of 7 minutes and 27 seconds was reported for the model.
Interior
The interior of the GT3 RS 4.0 was designed with a focus on functionality for performance driving. Standard equipment included lightweight racing-style bucket seats with carbon fiber shells, upholstered in black leather and Alcantara. Alcantara was also applied to the steering wheel rim, gearshift lever, headliner, and door panels. "RS 4.0" logos were embroidered on the headrests and featured on the door sill guards, alongside a dashboard plaque indicating the car's limited production number. Many vehicles were specified with the optional Clubsport package, which added a bolt-in rear roll cage (available in red or black), preparation for a battery master switch, a six-point racing harness for the driver's seat, and a fire extinguisher.
Legacy and Collectibility
Upon its release, the Porsche 911 GT3 RS 4.0 became a subject of interest for car collectors, partly due to its limited production run of 600 units. It is often cited by automotive publications and owners as a highly engaging car to drive and is considered by some to be a notable example of the naturally aspirated, manual transmission 911. Its status as the final road-going 911 model to feature this evolution of the Mezger engine contributes to its place in Porsche's model history. Market values for the GT3 RS 4.0 have generally increased since its introduction. The engineering focus on lightweight construction, aerodynamics, and driver feedback seen in the RS 4.0 has been noted in subsequent Porsche GT models.
Final Verdict
The Porsche 911 GT3 RS 4.0 is a distinct model in Porsche's 911 lineage, characterized by its 4.0-liter naturally aspirated Mezger engine, manual transmission, and focus on track-derived performance. Its limited production and specific engineering features have established its position as a significant car for Porsche enthusiasts and collectors. It represents a particular approach to sports car design, emphasizing driver involvement and dynamic capability.
