2020 Porsche 911 Carrera Cabriolet — Full Specifications
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The 2020 Porsche 911 Carrera Cabriolet is a coupe powered by a 3L 6-cyl turbo premium gasoline engine. It returns around 24 mpg (UK) / 20 mpg (US EPA) combined. Owners often keep a Porsche 911 Carrera Cabriolet workshop manual to hand for servicing and repairs.
Related listing: see also the 2020 Porsche 911 Carrera page for the base 911 Carrera listing, which may cover additional engines and body styles.
Compared with the 2019 Porsche 911 Carrera Cabriolet: Fuel economy slips from 29 to 24 mpg (UK) combined on the most efficient configuration. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 3L 6-cyl turbo |
|---|---|
| Transmission | Automatic (AM-S8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-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) | 24 combined / 20 urban / 29 extra-urban mpg |
| Fuel Economy (US EPA) | 20 combined / 17 city / 24 highway mpg |
| CO₂ Emissions | 281 g/km |
| EPA Greenhouse Gas Score | 4 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $4,100 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 1 configuration for the 2020 Porsche 911 Carrera Cabriolet, all with the 3L 6-cyl turbo engine. 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 |
|---|---|---|---|---|---|---|
| 3L 6-cyl turbo | Automatic (AM-S8) | Rear-Wheel Drive | 24 | 20 (17/24) | 281 | $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 2020 Porsche 911 Carrera Cabriolet
Running Costs: 2020 Porsche 911 Carrera Cabriolet
Covering around 8,000 miles a year in a 2020 Porsche 911 Carrera Cabriolet at 24 mpg combined, expect roughly 1,515 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $4,100 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.
2020 Porsche 911 Carrera 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.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 5 safety recall campaigns that include the 2020 Porsche 911 Carrera Cabriolet (as of 6 October 2026). Most affected areas: Power train (2), Service brakes (1), Suspension (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Service brakes — campaign 21V697000, reported 8 September 2021. Risk: A detached pressure input rod will cause the brake pedal to fail, increasing the risk of a crash.
- Suspension — campaign 21V201000, reported 24 March 2021. Risk: A loose connection may fail, causing driving instability and increasing the risk of a crash.
- Power train — campaign 20V381000, reported 1 July 2020. Risk: Components such as the fuel tank or drive shafts may become damaged from the loose differential. Damage to the fuel tank can result in fuel leakage, which in the presence of an ignition source may increase the…
- Exterior lighting — campaign 19V878000, reported 11 December 2019. Risk: If the hazard warning lights cannot be activated, there is an increased risk of a crash in a hazard situation.
Showing the 4 most recent of 5 campaigns.
Owners have filed 6 complaints with NHTSA about the 2020 Porsche 911 Carrera Cabriolet. The most-reported areas are Engine (3), Power train (2), Fuel/propulsion system (1).
Used-buyer checklist for the 2020 Porsche 911 Carrera Cabriolet
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Transmission & drivetrain (2 recall campaigns · 2 owner complaints) — On the test drive, watch for hesitation, jerking or slipping between gears and ask for transmission service history.
- Lighting (1 recall campaign · 1 owner complaint) — Check every exterior light works and look for moisture inside the lamp housings.
- Brakes (1 recall campaign) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
- Suspension (1 recall campaign) — Listen for knocks over bumps and check tyre wear for signs of alignment problems.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Porsche 911 Carrera Cabriolet compare to similar coupes? Coupes in our database average around 25 mpg (UK) combined — this model sits close to that average, within 1 mpg. This comparison is based on 1072 coupes in our dataset.
Porsche models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2020 Porsche 911 Carrera Cabriolet's 24 mpg is 2 mpg below that make average. Its 281 g/km CO₂ figure is 27 g/km higher than the 254 g/km Porsche average.
Of the 17 Porsche 911 Carrera Cabriolet model years we cover, the 2020 ranks 13th for combined fuel economy on its best configuration (24 mpg UK combined, against a high of 29 mpg). See every Porsche 911 Carrera 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.
Recommended Accessories for the 2020 Porsche 911 Carrera Cabriolet
Frequently Asked Questions
What engine does the 2020 Porsche 911 Carrera Cabriolet have?
It's fitted with a 3L 6-cyl turbo premium gasoline engine, paired with a automatic (am-s8) transmission.
What is the fuel economy of the 2020 Porsche 911 Carrera Cabriolet?
The most efficient configuration returns around 24 mpg (UK) combined, or 20 mpg on the US EPA cycle.
How much does the 2020 Porsche 911 Carrera Cabriolet cost to fuel per year?
The US EPA estimates about $4,100 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.
Does the 2020 Porsche 911 Carrera Cabriolet have any recalls?
NHTSA lists 5 safety recall campaigns that include the 2020 Porsche 911 Carrera Cabriolet (as of 6 October 2026). Most affected areas: Power train (2), Service brakes (1), Suspension (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2020 Porsche 911 Carrera Cabriolet?
Among the 6 owner complaints filed with NHTSA, the most-reported areas are Engine (3 complaints), Power train (2 complaints), Fuel/propulsion system (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2020 Porsche 911 Carrera 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 Cabriolet's fuel economy good for a coupe?
It returns around 24 mpg (UK) combined, against a same-body-style average of roughly 25 mpg among the coupes we track.