2011 Porsche 911 Carrera 4S Cabriolet — Full Specifications
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The 2011 Porsche 911 Carrera 4S Cabriolet is a coupe powered by a 3.8L 6-cyl premium gasoline engine. Its most fuel-efficient configuration returns around 25 mpg (UK) / 21 mpg (US EPA) combined, with 24–25 mpg (UK) across all configurations. Owners often keep a Porsche 911 Carrera 4S Cabriolet workshop manual to hand for servicing and repairs.
Related listing: see also the 2011 Porsche 911 Carrera page for the base 911 Carrera listing, which may cover additional engines and body styles.
Compared with the 2010 Porsche 911 Carrera 4S Cabriolet: Fuel economy is essentially unchanged at around 25 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 3.8L 6-cyl |
|---|---|
| Transmission | Automatic 7-spd |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | All-Wheel Drive |
| Body Style | Coupe |
| Passenger Volume (EPA) | 68 cu ft (1,926 L) |
| Luggage Volume (EPA) | 5 cu ft (142 L) |
| Fuel Economy (UK) | 25 combined / 23 urban / 31 extra-urban mpg |
| Fuel Economy (US EPA) | 21 combined / 19 city / 26 highway mpg |
| CO₂ Emissions | 263 g/km |
| EPA Est. Annual Fuel Cost | $3,900 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2011 Porsche 911 Carrera 4S Cabriolet, all with the 3.8L 6-cyl engine. Combined fuel economy ranges from 20 to 21 mpg (US), or 24 to 25 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.8L 6-cyl | Automatic 7-spd | All-Wheel Drive | 25 | 21 (19/26) | 263 | $3,900 |
| 3.8L 6-cyl | Manual 6-spd | All-Wheel Drive | 24 | 20 (18/24) | 276 | $4,100 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 68 cubic feet (about 1,926 litres) and luggage volume at 5 cubic feet (about 142 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2011 Porsche 911 Carrera 4S Cabriolet
Running Costs: 2011 Porsche 911 Carrera 4S Cabriolet
Covering around 8,000 miles a year in a 2011 Porsche 911 Carrera 4S Cabriolet at 25 mpg combined, expect roughly 1,455 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,900 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2011 Porsche 911 Carrera 4S Cabriolet Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
How It Compares
How does the Porsche 911 Carrera 4S Cabriolet compare to similar coupes? Coupes in our database average around 25 mpg (UK) combined — this model sits close to that average, within 0 mpg. Its 263 g/km CO₂ figure is 15 g/km lower than the 278 g/km average for coupes on this site. This comparison is based on 1072 coupes in our dataset.
At 25 mpg (UK) combined it sits close to the 26 mpg average for Porsche models in our database.
Of the 16 Porsche 911 Carrera 4S Cabriolet model years we cover, the 2011 ranks 4th for combined fuel economy on its best configuration (25 mpg UK combined, against a high of 29 mpg). See every Porsche 911 Carrera 4S Cabriolet year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
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Frequently Asked Questions
What engine does the 2011 Porsche 911 Carrera 4S Cabriolet have?
It's fitted with a 3.8L 6-cyl premium gasoline engine, paired with a automatic 7-spd transmission.
What is the fuel economy of the 2011 Porsche 911 Carrera 4S Cabriolet?
The most efficient configuration returns around 25 mpg (UK) combined, or 21 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 24 to 25 mpg.
How much does the 2011 Porsche 911 Carrera 4S Cabriolet cost to fuel per year?
The US EPA estimates about $3,900 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
How much interior and luggage space does the 2011 Porsche 911 Carrera 4S Cabriolet have?
EPA measures interior passenger volume at 68 cubic feet (about 1,926 litres) and luggage volume at 5 cubic feet (about 142 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.
Is the Porsche 911 Carrera 4S Cabriolet's fuel economy good for a coupe?
It returns around 25 mpg (UK) combined, against a same-body-style average of roughly 25 mpg among the coupes we track.