Bentley Bentayga Speed Auto (2020)
Estimated running costs and MOT pass rates from 117 MOT tests in 2024.
Annual Cost
£2,413
£201/month
MOT Pass Rate
100%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 35-50
5950cc Petrol
Great Choice
100% pass rate, £2,413/year to run. 18 points above average.
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Annual Running Costs
~30 mpg
Standard rate (from April 2017)
Low estimate due to excellent reliability
Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).
Reliability Verdict
Excellent reliability. Very few MOT failures. That's 18 points above the average of 82% across all models in our data. It also outperforms the Bentley brand average of 94%.
100% of MOT tests on Bentley Bentayga Speed Autos from 2020 ended in a pass in 2024, when they were about 4 years old. That's based on 117 tests across the UK, retests included. The average mileage recorded at those tests was 22,918 miles.
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How Does It Compare?
Mileage Analysis
22,918
Average miles
29,600
Expected for age
The average 2020 Bentley Bentayga Speed Auto had 22,918 miles on the clock at its 2024 MOT, which is below the expected 29,600 miles for a 4-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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Bentley Bentayga Speed Auto by Year
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About the 2020 Bentley Bentayga Speed Auto
The 2020 Bentley Bentayga Speed Auto is a luxury car. Our records list a 5950cc petrol engine, though engines vary between versions. 117 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It ranks in the top 1% of all 2020 models for MOT pass rate.
With an average of 22,918 miles recorded at its 2024 MOT tests, Bentley Bentayga Speed Auto owners tend to use this car less than the typical driver.
2020 Bentley Bentayga Speed Auto Fuel Costs
The 5950cc 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 £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).
What does it cost to own a 2020 Bentley Bentayga Speed Auto?
Total estimated annual running cost is £2,413 (£201/month), broken down as £1,958 fuel, £200 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.
Buying a Used 2020 Bentley Bentayga Speed Auto
At 6 years old, the Bentley Bentayga Speed 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
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
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 Bentley Bentayga Speed Auto stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| Bentley Bentayga Speed Auto(2020) | 100% | £1,958 | £200 | Grp 35-50 | £2,413 |
| Bentley Continental GT(2018) | 97% | £1,958 | £200 | Grp 35-50 | £2,413same |
| Aston Martin Vanquish(2018) | 97% | £1,958 | £200 | Grp 35-50 | £2,413same |
| Bentley Continental Flying Spur W12 A(2020) | 98% | £1,958 | £200 | Grp 35-50 | £2,413same |
| Ferrari GTC4 Lusso V12(2018) | 97% | £1,958 | £200 | Grp 35-50 | £2,413same |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2020 Bentley Bentayga Speed Auto
Is the 2020 Bentley Bentayga Speed Auto reliable?
Excellent reliability. Very few MOT failures. 100% of MOT tests on 2020 Bentley Bentayga Speed Autos ended in a pass, from 117 tests (DVSA MOT data for tests in 2024, retests included). That's 18 points above the average of 82% across all models in the same data.
How much does a 2020 Bentley Bentayga Speed Auto cost to run?
Our estimate is £2,413 a year (£201 a month): £1,958 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2020 Bentley Bentayga Speed Auto?
100% of 117 MOT tests on the 2020 Bentley Bentayga Speed Auto ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 4th of 2,554 models first registered in 2020 (top 1%).
What is the average mileage for a 2020 Bentley Bentayga Speed Auto?
The average mileage recorded at MOT tests on the 2020 Bentley Bentayga Speed Auto is 22,918 miles, which is below the expected 29,600 miles for a 4-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Related Bentley Models
Explore other Bentley cars or similar models in the same category.
Bentley Continental
2007 · 5998cc Petrol
Bentley Continental GT
2019 · 3996cc Petrol
Bentley Bentayga
2018 · 3956cc Diesel
Bentley Continental GT
2018 · 5998cc Petrol
Aston Martin Vanquish
2018 · 5935cc Petrol
Bentley Continental Flying Spur W12 A
2020 · 5950cc Petrol
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