2021 Audi A4 Avant 2.0 TDI S Line

Overview

• Make: Audi
• Model: A4 Avant
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 5dr (160 bhp)
• Year: 2021
• Mileage: 35,650 miles
• Fuel: Diesel, mild hybrid
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 160 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 Avant S Line has covered 35,650 miles, around 24,100 fewer miles than is typical for its age. The dealer is asking £20,995, which is £397 below the AskCar estimate of £21,392. To work out the AskCar estimate, we analyse UK dealer adverts for 1,202 Audi A4 Avant cars across different ages and specifications. The asking price is now £2,000 lower than when we first recorded the advert 158 days ago. Our records show an MOT expiry date of 4 June 2026, which has passed. Ask the dealer for an update. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Rodden Road Cars in Frome. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £397 (1%) under the AskCar estimate of £21,392.

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 1,202 priced Audi A4 Avant adverts across different ages and specifications, as of 2 November 2026.

A 2021 Audi A4 Avant with the 2.0 diesel engine is typically advertised at £18,500: the median of the 93 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 Audi A4 Avant has been on sale for at least 158 days.

Price history

AskCar first saw this advert on 28 May 2026 at £22,995. Its asking price is now £20,995, £2,000 less. The latest price cut was seen on 20 August 2026.

Price changes recorded:

• 29 May 2026: £22,995
• 25 July 2026: £21,995
• 20 August 2026: £20,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: the latest record we hold ran out on 4 June 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 5 June 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 21,953 miles, which matches the advertised 35,650 miles.

Advertised mileage is about 24,100 miles lower than the median mileage of a 2021 Audi A4 Avant on AskCar.

Similar cars

18 other 2021 Audi A4 Avant S Line 2.0 diesel automatic estates are for sale at UK dealers, from £8,999 to £22,000, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 Avant S Line, 2.0 diesel estate, black. Mileage: 37,348 miles. Price: £22,000, £1,005 more than this car. Dealer: Sytner Group Nottingham Audi in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-fdc420d540c4
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, blue. Mileage: 31,036 miles. Price: £19,916, £1,079 less than this car. Dealer: Carsa Cannock in Cannock. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-0ba1228a6b50
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, black. Mileage: 40,699 miles. Price: £19,995, £1,000 less than this car. Dealer: Victoria Motors in Gillingham. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-487ce2dc53ef

• The nearest: 2021 Audi A4 Avant S Line, 2.0 diesel estate, black, under a mile from this car. Mileage: 70,000 miles. Price: £16,995, £4,000 less than this car. Dealer: Rodden Road Cars in Frome. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-dde9aa6fce07