CarCostCheck

PORSCHE 911 (2021)

Running costs, common problems, and reliability data based on 72 real MOT tests in 2024.

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MOT Pass Rate

100%

Total Tests (2024)

72

Avg Mileage

11,708 mi

Est. Annual Cost

£2,037

Is the 2021 PORSCHE 911 reliable?

Excellent reliability. Very few MOT failures. That's 18 points above the national average of 82%. It also outperforms the PORSCHE brand average of 92%.

At 3 years old, 100% of PORSCHE 911s from 2021 passed their MOT first time in 2024. That's based on 72 tests across the UK. The average mileage at this age is 11,708 miles.

How does the 2021 PORSCHE 911 compare?

Rank among all 2021 cars18th out of 3,373(top 1%)
Rank among all PORSCHE models7th out of 276(top 3%)
vs national average+18% (82% avg)
vs 2021 cars average+8% (92% avg)
vs PORSCHE average+8% (92% avg)

Mileage Analysis

The average 2021 PORSCHE 911 has 11,708 miles on the clock, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.

How much does a 2021 PORSCHE 911 cost to run?

⛽Fuel (Petrol, 2981cc)
£1,592
🏛️Road Tax
£190
🔧MOT Test
£55
🛠️Predicted Repairs
£200
Total per year£2,037
Per month£170/mo

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.

PORSCHE 911 by Year

YearPass RateTestsAvg Mileage
2021100%7211,708 mi
202097%2,36617,049 mi
201997%7,18820,907 mi
201896%7,62318,989 mi
201797%6,20026,067 mi
201697%5,52428,111 mi
201597%4,95032,698 mi
201496%4,80632,843 mi
201396%3,53543,937 mi
201295%4,25350,959 mi
201195%2,58043,837 mi
201094%3,65649,709 mi
200992%3,05559,885 mi
200892%4,21658,132 mi
200790%5,36662,566 mi
200690%6,18470,206 mi
200590%5,98673,824 mi
200488%5,19174,425 mi
200387%5,16882,296 mi
200286%4,97284,310 mi
200188%2,88587,628 mi
200086%2,09990,453 mi
199987%3,66894,086 mi
199885%3,33799,008 mi
199790%2,10376,331 mi
199691%2,65180,487 mi
199589%1,83180,965 mi
199491%1,47395,559 mi
199391%69889,736 mi
199294%61181,375 mi
199191%92981,480 mi
199091%1,88894,950 mi

Checking a specific PORSCHE 911?

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About the 2021 PORSCHE 911

The 2021 PORSCHE 911 is a luxury with a 2981cc petrol engine. 72 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 1% of all 2021 cars for reliability.

With an average of 11,708 miles at 3 years old, PORSCHE 911 owners tend to use this car less than the typical driver.

2021 PORSCHE 911 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 2021 PORSCHE 911?

Total estimated annual running cost is £2,037 (£170/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 100% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

PORSCHE 911 Reliability Trend

Newer PORSCHE 911s show better MOT pass rates than older ones, with an average improvement of 6 percentage points.

Buying a Used 2021 PORSCHE 911

At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. Note: with only 72 tests in our data, these figures should be treated as indicative rather than definitive.

Alternatives to the 2021 PORSCHE 911

The PORSCHE 911 is actually the most reliable option among similar petrol luxurys from this era. Here are comparable petrol cars with similar engines: