The Porsche 911 Cabriolet (991) Carrera S 3.8, produced from 2011 to 2015, represents a significant evolution in the iconic 911 lineage. Falling within the seventh generation (991) of the 911, this variant offered an open-top experience combined with a potent 3.8-liter flat-six engine and Porsche’s advanced PDK (Porsche Doppelkupplung) dual-clutch transmission. Positioned as a mid-range offering within the 991 Cabriolet lineup, it bridged the gap between the base Carrera and the more performance-focused Carrera GTS models. The 991 generation marked a move towards increased interior space, improved ride quality, and enhanced technology while retaining the classic 911 silhouette and driving dynamics.
Technical Specifications
| Brand | Porsche |
| Model | 911 |
| Generation | 911 Cabriolet (991) |
| Type (Engine) | Carrera S 3.8 (400 Hp) PDK |
| Start of production | 2011 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 12.2 l/100 km (19.3 US mpg, 23.2 UK mpg, 8.2 km/l) |
| Fuel consumption (economy) – extra urban | 6.9 l/100 km (34.1 US mpg, 40.9 UK mpg, 14.5 km/l) |
| Fuel consumption (economy) – combined | 8.9 l/100 km (26.4 US mpg, 31.7 UK mpg, 11.2 km/l) |
| CO2 emissions | 207 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.3 sec |
| Acceleration 0 – 62 mph | 4.3 sec |
| Acceleration 0 – 60 mph | 4.1 sec |
| Maximum speed | 299 km/h (185.79 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 3.8 kg/Hp, 265.8 Hp/tonne |
| Weight-to-torque ratio | 3.4 kg/Nm, 292.4 Nm/tonne |
| Power | 400 Hp @ 7400 rpm |
| Power per litre | 105.3 Hp/l |
| Torque | 440 Nm @ 5600 rpm (324.53 lb.-ft. @ 5600 rpm) |
| Engine layout | Rear, Longitudinal |
| Engine Model/Code | MA1.03 |
| Engine displacement | 3800 cm3 (231.89 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Boxer |
| Cylinder Bore | 102 mm (4.02 in.) |
| Piston Stroke | 77.5 mm (3.05 in.) |
| Compression ratio | 12.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 29 l (30.64 US qt | 25.52 UK qt) |
| Kerb Weight | 1505 kg (3317.96 lbs.) |
| Max. weight | 1905 kg (4199.81 lbs.) |
| Max load | 400 kg (881.85 lbs.) |
| Trunk (boot) space – minimum | 290 l (10.24 cu. ft.) |
| Fuel tank capacity | 64 l (16.91 US gal | 14.08 UK gal) |
| Length | 4491 mm (176.81 in.) |
| Width | 1808 mm (71.18 in.) |
| Height | 1292 mm (50.87 in.) |
| Wheelbase | 2450 mm (96.46 in.) |
| Front track | 1538 mm (60.55 in.) |
| Rear (Back) track | 1516 mm (59.69 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle | 10.9 m (35.76 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, 340 mm |
| Rear brakes | Ventilated discs, 330 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/35 ZR20; 295/30 ZR20 |
| Wheel rims size | 8.5J x 20; 11J x 20 |
Powertrain & Engine Architecture
At the heart of the 991 Carrera S Cabriolet lies the MA1.03 engine, a 3.8-liter naturally aspirated flat-six. This engine builds upon the advancements of previous 911 engines, featuring direct fuel injection (DFI) for improved efficiency and power delivery. The DFI system injects fuel directly into the combustion chamber, allowing for more precise control of the air-fuel mixture. The engine also utilizes an intermediate shaft to reduce engine vibrations inherent in the flat-six configuration. The valvetrain employs four valves per cylinder, contributing to the engine’s high-revving nature and power output. Paired with this engine is Porsche’s 7-speed PDK dual-clutch transmission. The PDK offers both fully automatic operation and manual gear selection via steering wheel-mounted paddles, providing a blend of convenience and driver engagement. The PDK’s lightning-fast shifts contribute significantly to the car’s acceleration performance.
Driving Characteristics
The 991 Carrera S Cabriolet with the PDK transmission delivers a compelling driving experience. The 400 horsepower and 324 lb-ft of torque provide brisk acceleration, with 0-60 mph times consistently around 4.1 seconds. The PDK transmission’s quick shifts and intelligent programming ensure that power is readily available. Compared to the standard Carrera, the ‘S’ model offers a noticeably more responsive throttle and increased performance. While not as raw or visceral as a manual transmission equipped 911, the PDK provides a smooth and efficient driving experience, particularly in everyday traffic. The gear ratios are optimized for both acceleration and cruising, making it a versatile performer. The open-top configuration adds to the driving enjoyment, although it does introduce some wind noise at higher speeds.
Equipment & Trim Levels
The Carrera S Cabriolet came standard with a generous array of features, including leather upholstery, automatic climate control, a touchscreen infotainment system, and bi-xenon headlights. Optional extras were plentiful, allowing buyers to personalize their vehicles. Popular options included the Sport Chrono Package (which added launch control and a sportier driving mode), adaptive suspension (Porsche Active Suspension Management or PASM), and various interior trim upgrades. The standard interior featured a modern design with a focus on ergonomics. Upholstery options included various leather colors and materials, and buyers could choose from a range of dashboard and trim finishes.
Chassis & Braking
The 991 Cabriolet’s chassis is a sophisticated blend of aluminum and steel construction, designed to provide a balance of rigidity and weight savings. The suspension system features independent suspension all around, with McPherson struts at the front and a multi-link setup at the rear. The Carrera S benefited from a slightly stiffer suspension setup compared to the base Carrera. Braking duties are handled by ventilated disc brakes on all four wheels. The front brakes measure 340mm in diameter, while the rear brakes are 330mm. ABS (Anti-lock Braking System) is standard, providing enhanced stopping power and stability. The steering system is a rack-and-pinion setup with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The 991 Carrera S Cabriolet was generally well-received by automotive critics. Praise was directed towards its performance, handling, and refined interior. Critics noted the improved ride quality compared to previous 911 generations, while still maintaining the car’s signature sporty character. Compared to the base Carrera, the ‘S’ model offered a significant performance upgrade, justifying the higher price tag for many buyers. Fuel economy was respectable for a high-performance sports car, averaging around 26.4 US mpg in combined driving. Reliability was generally good, although some owners reported minor issues with the PDK transmission and the cooling system.
Legacy
The 991 Carrera S Cabriolet remains a desirable sports car in the used market. The MA1.03 engine is known for its durability and relatively straightforward maintenance. The PDK transmission, while complex, has proven to be reliable when properly maintained. Values for well-maintained examples have remained relatively stable, reflecting the 911’s enduring appeal. The 991 generation is considered by many to be a sweet spot in the 911 lineage, offering a blend of classic 911 character and modern technology. Its combination of performance, comfort, and open-top driving experience continues to attract enthusiasts today.
