BMW M8 COMPETITION AUTO (2021)
Running costs, reliability data, and common problems from 590 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
98%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 35-50
4395cc Petrol
Great Choice
98% pass rate, £2042/year to run. 16 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 16 points above the national average of 82%. It also outperforms the BMW brand average of 88%.
At 5 years old, 98% of BMW M8 COMPETITION AUTOs from 2021 passed their MOT first time in 2026. That's based on 590 tests across the UK. The average mileage at this age is 22,960 miles.
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How Does It Compare?
Mileage Analysis
22,960
Average miles
37,000
Expected for age
The average 2021 BMW M8 COMPETITION AUTO has 22,960 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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BMW M8 COMPETITION AUTO by Year
Similar Cars to Consider
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About the 2021 BMW M8 COMPETITION AUTO
The 2021 BMW M8 COMPETITION AUTO is a premium performance with a 4395cc petrol engine. 590 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It ranks in the top 5% of all 2021 cars for reliability.
With an average of 22,960 miles at 5 years old, BMW M8 COMPETITION AUTO owners tend to use this car less than the typical driver.
2021 BMW M8 COMPETITION AUTO Fuel Costs
The 4395cc 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 BMW M8 COMPETITION 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 98% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
BMW M8 COMPETITION AUTO Reliability Trend
The BMW M8 COMPETITION AUTO has maintained consistent MOT pass rates across model years, varying by only 1 percentage points.
Buying a Used 2021 BMW M8 COMPETITION AUTO
At 5 years old, the BMW M8 COMPETITION 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 2021 BMW M8 COMPETITION AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
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 2021 BMW M8 COMPETITION AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| BMW M8 COMPETITION AUTO(2021) | 98% | £1592 | £195 | Grp 35-50 | £2042 |
| MERCEDES C(2019) | 91% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| PORSCHE CAYENNE(2019) | 95% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| PORSCHE 911(2019) | 97% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| AUDI A6(2020) | 94% | £1592 | £190 | Grp 35-50 | £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 Bmw Models
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