2021 Audi A4 Avant 2.0 TFSI S Line
Price: £18,995. Fair price: £664 (3%) under the AskCar estimate of £19,659, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,232 priced Audi A4 Avant adverts on AskCar as of 4 November 2026.
AskCar lists 1,265 used Audi A4 Avant from 842 UK dealerships, as of 4 November 2026.
Overview
- Make: Audi
- Model: A4 Avant
- Trim: S Line
- Version: 2.0 TFSI 40 S Line S tronic FWD Euro 6 (s/s) 5dr (201 bhp)
- Year: 2021
- Mileage: 39,000 miles
- Fuel: Petrol, mild hybrid
- Body: Estate, 5 doors, 5 seats
- Engine: 2.0 litres, 201 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: White
- CO2: 160 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Audi A4 Avant S Line is advertised with 39,000 miles, approximately 20,700 below the typical mileage for its age. Its asking price of £18,995 is £664 below the AskCar estimate of £19,659. The AskCar estimate uses UK dealer asking prices, including 1,232 Audi A4 Avant adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert for 25 days. Its advertised mileage matches the government's MOT record. The seller is GT Motors, based in Saffron Walden. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £664 (3%) under the AskCar estimate of £19,659.
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 1,232 priced Audi A4 Avant adverts across different ages and specifications, as of 4 November 2026.
A 2021 Audi A4 Avant with the 2.0 petrol engine is typically advertised at £18,500: the median of the 95 for sale on AskCar, as of 4 November 2026.
Time on sale
This 2021 Audi A4 Avant has been on sale for at least 25 days.
Price history
AskCar first saw this advert on 10 October 2026 at £18,995. Its asking price has not changed.
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 30 September 2027.
It has had 3 MOTs. The latest, on 1 October 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 39,284 miles, which matches the advertised 39,000 miles.
Advertised mileage is about 20,700 miles lower than the median mileage of a 2021 Audi A4 Avant on AskCar.
Similar cars
5 other 2021 Audi A4 Avant S Line 2.0 petrol automatic estates are for sale at UK dealers, from £17,193 to £21,995, as of 4 November 2026.
The 3 closest to this car in mileage:
- 2021 Audi A4 Avant S Line, 2.0 petrol estate, black. Mileage: 37,139 miles. Price: £21,995, £3,000 more than this car. Dealer: JMS Cars in Staines. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-54021a407932
- 2021 Audi A4 Avant S Line, 2.0 petrol estate, white. Mileage: 36,190 miles. Price: £18,999, the same price as this car. Dealer: Fresh Motors in Watton. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-169e3b407c31
- 2021 Audi A4 Avant S Line, 2.0 petrol estate, white. Mileage: 51,190 miles. Price: £17,990, £1,005 less than this car. Dealer: Quattro Tech Cars in St Ives. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-67eaabc0f044
Browse all Audi A4 Avant cars for sale · 2021 Audi A4 Avant price guide
More like this
- Used Audi A4 Avant S Line prices
- Used Audi A4 Avant for sale under £20,000
- Used automatic Audi A4 Avant for sale
- Used petrol Audi A4 Avant for sale
- Used Audi A4 Avant for sale near Saffron Walden
Photos
41 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.