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: 31,041 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

At 31,041 miles, this 2021 Audi A4 Avant S Line has covered about 28,700 fewer miles than other 2021 Audi A4 Avant cars. The AskCar estimate for this car is £21,933. It is priced at £19,780, which is £2,153 below that estimate. The AskCar estimate draws on 1,232 Audi A4 Avant adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 7 days ago. Its asking price has since fallen by £67. The government's MOT record matches its advertised mileage. You can find this car at Carsa Cannock in Cannock Chase. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Good value: £2,153 (9%) under the AskCar estimate of £21,933.

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 diesel 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 7 days.

Price history

AskCar first saw this advert on 28 October 2026 at £19,847. Its asking price is now £19,780, £67 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 28 October 2026: £19,847
• 31 October 2026: £19,971
• 1 November 2026: £19,916
• 3 November 2026: £19,786
• 4 November 2026: £19,780

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 23 June 2027.

It has had 3 MOTs. The latest, on 9 June 2026, passed.

Advisories at the latest test: nearside front tyre slightly damaged.

Mileage at that test: 29,881 miles, which matches the advertised 31,041 miles.

Advertised mileage is about 28,700 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 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 Avant S Line, 2.0 diesel estate, blue. Mileage: 35,650 miles. Price: £20,995, £1,215 more than this car. Dealer: Rodden Road Cars in Frome. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-a059a41f72c2
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, black. Mileage: 37,348 miles. Price: £22,000, £2,220 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, black. Mileage: 40,699 miles. Price: £19,995, £215 more 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, grey, 18 miles from this car. Mileage: 108,000 miles. Price: £13,849, £5,931 less than this car. Dealer: Westley Motor Company in Birmingham. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-a6013213f90b