2021 Audi A4 2.0 TDI S Line
Price: £17,495. Fair price: £325 (1%) under the AskCar estimate of £17,820, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,427 priced Audi A4 adverts on AskCar as of 4 November 2026.
AskCar lists 1,488 used Audi A4 from 972 UK dealerships, as of 4 November 2026.
Overview
- Make: Audi
- Model: A4
- Trim: S Line
- Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
- Year: 2021
- Mileage: 50,200 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 2.0 litres, 160 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: Black
- CO2: 137 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Audi A4 S Line has covered 50,200 miles. The dealer is asking £17,495, which is £325 below the AskCar estimate of £17,820. To work out the AskCar estimate, we analyse UK dealer adverts for 1,427 Audi A4 cars across different ages and specifications. We first recorded this advert 43 days ago, and its asking price has since fallen by £500. Our latest MOT record expired on 25 October 2026. Check the current position with the dealer. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Evolve Motor Company in Newport. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £325 (1%) under the AskCar estimate of £17,820.
The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.
It draws on 1,427 priced Audi A4 adverts across different ages and specifications, as of 4 November 2026.
A 2021 Audi A4 with the 2.0 diesel engine is typically advertised at £17,100: the median of the 95 for sale on AskCar, as of 4 November 2026.
Time on sale
This 2021 Audi A4 has been on sale for at least 43 days.
Price history
AskCar first saw this advert on 22 September 2026 at £17,995. Its asking price is now £17,495, £500 less. The latest price cut was seen on 10 October 2026.
Price changes recorded:
- 22 September 2026: £17,995
- 10 October 2026: £17,495
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: the latest record we hold ran out on 25 October 2026; ask the dealer for the current MOT.
It has had 2 MOTs. The latest, on 15 October 2025, passed.
There were no advisories at the latest test.
Mileage at that test: 41,328 miles, which matches the advertised 50,200 miles.
Similar cars
16 other 2021 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £12,995 to £20,495, as of 4 November 2026.
The 3 closest to this car in mileage:
- 2021 Audi A4 S Line, 2.0 diesel saloon, black. Mileage: 44,514 miles. Price: £17,599, £104 more than this car. Dealer: Motorpoint Birtley in Birtley. AskCar page: https://askcar.co.uk/car/audi-a4-2021-7bbc75ccb0eb
- 2021 Audi A4 S Line, 2.0 diesel saloon, black. Mileage: 55,966 miles. Price: £16,999, £496 less than this car. Dealer: Bridgend Motor Group in Morley. AskCar page: https://askcar.co.uk/car/audi-a4-2021-ac0d199c23d4
- 2021 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 56,589 miles. Price: £16,998, £497 less than this car. Dealer: Used Car Sales Direct Exeter Direct in Exeter. AskCar page: https://askcar.co.uk/car/audi-a4-2021-de7aae9b2de1
Browse all Audi A4 cars for sale · 2021 Audi A4 price guide
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Photos
27 photos of this car are on its AskCar page.
As of 4 November 2026, AskCar lists 592,552 cars and vans from 12,964 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.