Audi Q8 SLN Vor 55 TFSI MHEV Quat A (2021)
Estimated running costs and MOT pass rates from 67 MOT tests in 2024.
Annual Cost
£2,413
£201/month
MOT Pass Rate
94%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 30-42
2995cc Petrol
Great Choice
94% pass rate, £2,413/year to run. 12 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 12 points above the average of 82% across all models in our data. It also outperforms the Audi brand average of 90%.
94% of MOT tests on Audi Q8 SLN Vor 55 TFSI MHEV Quat As from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 67 tests across the UK, retests included. The average mileage recorded at those tests was 28,025 miles.
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How Does It Compare?
Mileage Analysis
28,025
Average miles
22,200
Expected for age
The average 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A had 28,025 miles on the clock at its 2024 MOT, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
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Audi Q8 SLN Vor 55 TFSI MHEV Quat A by Year
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About the 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A
The 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A is a premium performance car. Our records list a 2995cc petrol engine, though engines vary between versions. 67 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. Among all models from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 28,025 miles recorded at its 2024 MOT tests, Audi Q8 SLN Vor 55 TFSI MHEV Quat A owners cover more miles than the average driver.
2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A Fuel Costs
The 2995cc 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 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A?
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 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A
At 5 years old, the Audi Q8 SLN Vor 55 TFSI MHEV Quat A offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 67 tests in our data, these figures should be treated as indicative rather than definitive.
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.
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 Audi Q8 SLN Vor 55 TFSI MHEV Quat A 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 |
|---|---|---|---|---|---|
| Audi Q8 SLN Vor 55 TFSI MHEV Quat A(2021) | 94% | £1,958 | £200 | Grp 30-42 | £2,413 |
| BMW 5 Series(2019) | 92% | £1,958 | £200 | Grp 30-42 | £2,413same |
| BMW X3(2019) | 92% | £1,958 | £200 | Grp 30-42 | £2,413same |
| Mercedes GLC(2019) | 93% | £1,958 | £200 | Grp 30-42 | £2,413same |
| BMW X5(2019) | 92% | £1,958 | £200 | Grp 30-42 | £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 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A
Is the 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A reliable?
Excellent reliability. Very few MOT failures. 94% of MOT tests on 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat As ended in a pass, from 67 tests (DVSA MOT data for tests in 2024, retests included). That's 12 points above the average of 82% across all models in the same data.
How much does a 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A 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 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A?
94% of 67 MOT tests on the 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 1351st of 3,336 models first registered in 2021 (top half).
What is the average mileage for a 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A?
The average mileage recorded at MOT tests on the 2021 Audi Q8 SLN Vor 55 TFSI MHEV Quat A is 28,025 miles, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Related Audi Models
Explore other Audi cars or similar models in the same category.
Audi A3
2015 · 1598cc Diesel
Audi A1
2016 · 1395cc Petrol
Audi A4
2017 · 1968cc Diesel
BMW 5 Series
2019 · 2998cc Petrol
BMW X3
2019 · 2998cc Petrol
Mercedes GLC
2019 · 2996cc Petrol
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