The Porsche 911 (991.2) GT3 RS 4.0, produced from 2018 to 2019, represents the pinnacle of naturally aspirated performance within the 991.2 generation of Porsche’s iconic sports car. This track-focused variant, distinguished by its 4.0-liter engine and Porsche Doppelkupplung (PDK) transmission, was designed to bridge the gap between the standard GT3 RS and full-fledged racing applications. It sits at the very top of the 991.2 lineup, offering a more extreme driving experience than any other variant, excluding the even more limited 911 R. The 991.2 generation itself brought a significant refresh to the 911 platform, including updated engine technology, revised styling, and enhanced interior features, and the GT3 RS 4.0 capitalized on these improvements to deliver unparalleled performance.
Technical Specifications
| Brand | Porsche |
| Model | 911 |
| Generation | 911 (991 II) |
| Type (Engine) | GT3 RS 4.0 (520 Hp) PDK |
| Start of production | 2018 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 19.2 l/100 km (12.3 US mpg, 14.7 UK mpg, 5.2 km/l) |
| Fuel consumption (economy) – extra urban | 9 l/100 km (26.1 US mpg, 31.4 UK mpg, 11.1 km/l) |
| Fuel consumption (economy) – combined | 12.8 l/100 km (18.4 US mpg, 22.1 UK mpg, 7.8 km/l) |
| CO2 emissions | 291 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 3.2 sec |
| Acceleration 0 – 62 mph | 3.2 sec |
| Acceleration 0 – 60 mph | 3 sec |
| Maximum speed | 312 km/h (193.87 mph) |
| Weight-to-power ratio | 2.8 kg/Hp, 363.6 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 328.7 Nm/tonne |
| Power | 520 Hp @ 8250 rpm |
| Power per litre | 130.1 Hp/l |
| Torque | 470 Nm @ 6000 rpm (346.65 lb.-ft. @ 6000 rpm) |
| Maximum engine speed | 9000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | MA1.76 |
| Engine displacement | 3996 cm3 (243.85 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Boxer |
| Compression ratio | 13.3:1 |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 28 l (29.59 US qt | 24.64 UK qt) |
| Kerb Weight | 1430 kg (3152.61 lbs) |
| Max. weight | 1793 kg (3952.89 lbs) |
| Max load | 363 kg (800.28 lbs) |
| Trunk (boot) space – minimum | 125 l (4.41 cu. ft.) |
| Fuel tank capacity | 64 l (16.91 US gal | 14.08 UK gal) |
| Length | 4557 mm (179.41 in) |
| Width | 1880 mm (74.02 in) |
| Width including mirrors | 1978 mm (77.87 in) |
| Height | 1297 mm (51.06 in) |
| Wheelbase | 2453 mm (96.57 in) |
| Front track | 1588 mm (62.52 in) |
| Rear (Back) track | 1557 mm (61.3 in) |
| Minimum turning circle | 11.1 m (36.42 ft) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission PDK |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 265/35 ZR 20; 325/30 ZR 21 |
| Wheel rims size | 9.5J x 20; 12.5J x 21 |
Powertrain & Engine Architecture
The heart of the 911 GT3 RS 4.0 is its naturally aspirated 4.0-liter flat-six engine, designated the MA1.76. This engine is a direct descendant of the engines used in Porsche’s successful motorsport programs, including the 911 RSR. It features a larger bore and stroke compared to the 3.8-liter engine found in earlier 991 GT3 models, allowing for increased displacement and power output. The engine utilizes direct fuel injection (DFI) and a dry-sump lubrication system, crucial for maintaining oil supply during high-g cornering. The valvetrain employs titanium connecting rods and a magnesium engine block to reduce weight and improve responsiveness. The 7-speed PDK dual-clutch transmission is specifically tuned for rapid shifts and optimal power delivery. Unlike some PDK variants, the GT3 RS 4.0’s PDK features a more aggressive shift strategy and closer gear ratios, prioritizing performance over comfort.
Driving Characteristics
The 911 GT3 RS 4.0 delivers a visceral and engaging driving experience. The 520 horsepower and 346 lb-ft of torque, while substantial, are delivered in a linear and predictable manner, encouraging the driver to explore the engine’s full 9,000 rpm redline. The PDK transmission provides incredibly quick shifts, but the car truly shines when driven with precision and finesse. Compared to the standard GT3 RS, the 4.0 feels noticeably more potent, particularly in the mid-range. While the manual transmission offered in other GT3 RS models provides a more traditional sports car feel, the PDK version offers faster lap times and a more accessible experience for a wider range of drivers. The car’s aerodynamic package, including a large rear wing and aggressive front splitter, generates significant downforce, providing exceptional stability at high speeds.
Equipment & Trim Levels
The GT3 RS 4.0 was largely focused on performance, so luxury features were minimized. Standard equipment included a lightweight interior with carbon fiber trim, sport seats with fabric centers, and a Club Sport package featuring a roll cage and six-point harnesses. Optional extras included full bucket seats, a fire extinguisher, and various customization options through Porsche’s “Personalization Plus” program. The interior was spartan but functional, prioritizing weight savings and driver focus. Air conditioning and a basic audio system were standard, but many owners opted to delete these features to further reduce weight.
Chassis & Braking
The chassis of the GT3 RS 4.0 is based on the 911 Turbo’s wider body, providing a more stable platform for the increased power and aerodynamic forces. The suspension features adjustable dampers and coil-over springs, allowing drivers to fine-tune the car’s handling characteristics. Braking duties are handled by carbon-ceramic brakes (PCCB) as standard, providing exceptional stopping power and fade resistance. The rear track is wider than the standard 911, contributing to improved stability and cornering grip. The steering is precise and communicative, providing excellent feedback to the driver.
Market Reception & Comparison
The 911 GT3 RS 4.0 was widely praised by automotive journalists for its exceptional performance and engaging driving experience. Critics lauded the engine’s responsiveness, the PDK transmission’s speed, and the car’s overall balance. Compared to the standard GT3 RS, the 4.0 was considered a significant step up in terms of performance and exclusivity. Fuel economy, unsurprisingly, was not a strong point, with combined fuel consumption around 18.4 US mpg. Reliability has generally been good, although the high-performance nature of the car means that maintenance costs can be substantial.
Legacy
The 911 GT3 RS 4.0 is now a highly sought-after collector’s item. Its limited production run and exceptional performance have made it a favorite among Porsche enthusiasts. The MA1.76 engine is considered one of the finest naturally aspirated engines ever produced by Porsche, and the car represents a high point in the development of the 911 platform. Well-maintained examples command premium prices on the used car market, and the car is likely to appreciate in value over time. The GT3 RS 4.0 serves as a reminder of a time when Porsche prioritized pure driving enjoyment over technological complexity, and it remains a benchmark for naturally aspirated sports car performance.
