PORSCHE 911 CARRERA 4S AUTO (2020)
Running costs, reliability data, and common problems from 216 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
92%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 30-42
2981cc Petrol
Great Choice
92% pass rate, £2042/year to run. 10 points above average.
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Annual Running Costs
~30 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 10 points above the national average of 82%.
At 6 years old, 92% of PORSCHE 911 CARRERA 4S AUTOs from 2020 passed their MOT first time in 2026. That's based on 216 tests across the UK. The average mileage at this age is 15,787 miles.
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How Does It Compare?
Mileage Analysis
15,787
Average miles
44,400
Expected for age
The average 2020 PORSCHE 911 CARRERA 4S AUTO has 15,787 miles on the clock, which is significantly below the expected 44,400 miles for a 6-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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Best Year to Buy?
The most reliable year is the 2021 model with a 98% MOT pass rate, while the 2020 model has the lowest at 92%. Consider a different year if reliability is a priority.
PORSCHE 911 CARRERA 4S AUTO by Year
Similar Cars to Consider
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About the 2020 PORSCHE 911 CARRERA 4S AUTO
The 2020 PORSCHE 911 CARRERA 4S AUTO is a luxury with a 2981cc petrol engine. 216 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2020, the average MOT pass rate is 92%, and this model falls short of that benchmark.
With an average of 15,787 miles at 6 years old, PORSCHE 911 CARRERA 4S AUTO owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
2020 PORSCHE 911 CARRERA 4S AUTO Fuel Costs
The 2981cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2020 PORSCHE 911 CARRERA 4S AUTO?
Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2020 PORSCHE 911 CARRERA 4S AUTO
At 6 years old, the PORSCHE 911 CARRERA 4S AUTO offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
Based on the 2020 PORSCHE 911 CARRERA 4S AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 6 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Low riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2020 PORSCHE 911 CARRERA 4S AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| PORSCHE 911 CARRERA 4S AUTO(2020) | 92% | £1592 | £195 | Grp 30-42 | £2042 |
| BMW 5 SERIES(2018) | 91% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| LAND ROVER RANGE ROVER SPORT(2018) | 93% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| BMW X3(2019) | 92% | £1592 | £190 | Grp 30-42 | £2037-£5 |
| MERCEDES GLC(2019) | 93% | £1592 | £190 | Grp 30-42 | £2037-£5 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Porsche Models
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PORSCHE 911
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BMW 5 SERIES
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