The Porsche 911 Cabriolet (991) Carrera 3.4, produced from 2011 to 2015, represents a significant evolution in the iconic 911 lineage. Positioned as a core model within the 991 generation, it offered an open-top experience combining Porsche’s renowned performance with everyday usability. This variant, powered by a 3.4-liter flat-six engine producing 350 horsepower and paired with Porsche’s seven-speed PDK dual-clutch transmission, aimed to deliver a balance between exhilarating driving dynamics and relative fuel efficiency. It served as a popular entry point into the 911 Cabriolet range, appealing to buyers seeking a sophisticated and engaging sports car experience.
Technical Specifications
| Brand | Porsche |
| Model | 911 |
| Generation | 911 Cabriolet (991) |
| Type (Engine) | Carrera 3.4 (350 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 | 11.5 l/100 km (20.5 US mpg, 24.6 UK mpg, 8.7 km/l) |
| Fuel consumption (economy) – extra urban | 6.7 l/100 km (35.1 US mpg, 42.2 UK mpg, 14.9 km/l) |
| Fuel consumption (economy) – combined | 8.4 l/100 km (28 US mpg, 33.6 UK mpg, 11.9 km/l) |
| CO2 emissions | 195 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 284 km/h (176.47 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 4.3 kg/Hp, 234.9 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 261.7 Nm/tonne |
| Power | 350 Hp @ 7400 rpm |
| Power per litre | 101.9 Hp/l |
| Torque | 390 Nm @ 5600 rpm (287.65 lb.-ft. @ 5600 rpm) |
| Engine layout | Rear, Longitudinal |
| Engine Model/Code | MA1.04 |
| Engine displacement | 3436 cm3 (209.68 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Boxer |
| Cylinder Bore | 97 mm (3.82 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 | 1490 kg (3284.89 lbs.) |
| Max. weight | 1870 kg (4122.64 lbs.) |
| Max load | 380 kg (837.76 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 | 1299 mm (51.14 in.) |
| Wheelbase | 2450 mm (96.46 in.) |
| Front track | 1532 mm (60.31 in.) |
| Rear (Back) track | 1518 mm (59.76 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, 330 mm |
| Rear brakes | Ventilated discs, 330 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 235/40 ZR19; 285/35 ZR19 |
| Wheel rims size | 8.5J x 19; 11J x 19 |
Powertrain & Engine Architecture
At the heart of the 991 Carrera 3.4 Cabriolet lies the MA1.04 engine, a 3.4-liter naturally aspirated flat-six. This engine builds upon the established Porsche boxer design, known for its low center of gravity and smooth power delivery. Direct fuel injection (DFI) is a key feature, optimizing combustion efficiency and contributing to both performance and fuel economy. The engine utilizes four valves per cylinder, enhancing breathing and allowing for higher revs. The 350 horsepower peak is achieved at 7400 rpm, while the 390 Nm (287.65 lb-ft) of torque is available at 5600 rpm. Paired with this engine is Porsche’s seven-speed PDK (Porsche Doppelkupplung) dual-clutch transmission. This transmission offers incredibly fast and smooth gear changes, both in automatic and manual modes, contributing significantly to the car’s overall performance. The PDK utilizes two separate clutches, allowing for pre-selection of the next gear, minimizing interruption in power delivery.
Driving Characteristics
The 991 Carrera 3.4 PDK delivers a refined yet engaging driving experience. While not as brutally quick as the Carrera S or GTS models, the 350 hp engine provides ample power for spirited driving. The PDK transmission enhances acceleration, allowing for quick shifts and maintaining momentum. The gear ratios are tuned to provide a balance between acceleration and fuel efficiency. Compared to the six-speed manual transmission available on other 911 models, the PDK offers quicker acceleration times and a more accessible driving experience for a wider range of drivers. The rear-wheel-drive configuration contributes to the classic 911 handling characteristics, with a tendency towards oversteer if pushed to the limit. However, Porsche’s stability control systems help to mitigate this, making the car relatively forgiving.
Equipment & Trim Levels
The Carrera 3.4 Cabriolet came standard with a comprehensive list 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 sport seats, a Bose audio system, navigation, and various interior trim packages. The Cabriolet also featured a fully automatic retractable soft top, which could be raised or lowered in approximately 13 seconds, even while driving at speeds up to 31 mph.
Chassis & Braking
The 991 generation 911 benefited from a new, lighter chassis compared to its predecessor. The Carrera 3.4 Cabriolet utilizes an independent suspension system at all four corners, with McPherson struts at the front and a multi-link setup at the rear. This configuration provides a comfortable ride while maintaining excellent handling characteristics. Braking duties are handled by ventilated disc brakes on all four wheels. ABS (Anti-lock Braking System) is standard, providing enhanced stopping power and control. The Cabriolet’s chassis was specifically reinforced to compensate for the lack of a fixed roof, maintaining structural rigidity.
Market Reception & Comparison
The 991 Carrera 3.4 PDK was generally well-received by automotive critics. It was praised for its balanced performance, comfortable ride, and sophisticated technology. Compared to the more powerful Carrera S, the 3.4 offered a more accessible price point and slightly better fuel economy. However, some critics noted that it lacked the outright excitement of the S model. Against competitors like the Audi R8 Spyder and Mercedes-Benz SL, the 911 Cabriolet stood out for its unique driving dynamics and iconic design.
Legacy
The 991 Carrera 3.4 PDK has proven to be a reliable and durable sports car. The flat-six engine is known for its longevity, and the PDK transmission has also demonstrated good reliability. On the used car market, these models remain highly sought after, particularly those with a well-documented service history and desirable options. The 991 generation 911 is considered by many to be a sweet spot in the 911 lineage, offering a blend of classic Porsche character and modern technology. The Carrera 3.4 Cabriolet, in particular, represents a compelling option for buyers seeking an open-top sports car with a rich heritage and engaging driving experience.
