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: 70,000 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: Black
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 70,000 miles on the clock, this 2021 Audi A4 Avant S Line has done roughly 10,300 more miles than a typical 2021 Audi A4 Avant. Priced at £16,995, it is advertised £310 below the AskCar estimate of £17,305. To work out the AskCar estimate, we analyse UK dealer adverts for 1,202 Audi A4 Avant cars across different ages and specifications. It first appeared in our advert records 13 days ago. The government's MOT record matches its advertised mileage. You can find this car at 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: £310 (1%) under the AskCar estimate of £17,305.

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 13 days.

Price history

AskCar first saw this advert on 20 October 2026 at £16,995. 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 2 November 2026: valid until 9 July 2027.

It has had 3 MOTs. The latest, on 10 July 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 68,508 miles, which matches the advertised 70,000 miles.

Advertised mileage is about 10,300 miles higher 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: 65,309 miles. Price: £17,998, £1,003 more than this car. Dealer: Arnold Clark Glasgow BMW in Glasgow. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-fa0ba6af319d
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, black. Mileage: 60,608 miles. Price: £18,149, £1,154 more than this car. Dealer: Second Chance Car Finance in Wetherby. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-e62692a85e9d
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, white. Mileage: 60,000 miles. Price: £18,107, £1,112 more than this car. Dealer: David Hayton Autostore Penrith in Penrith. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-301c53af4bae

• The nearest: 2021 Audi A4 Avant S Line, 2.0 diesel estate, blue, under a mile from this car. Mileage: 35,650 miles. Price: £20,995, £4,000 more than this car. Dealer: Rodden Road Cars in Frome. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-a059a41f72c2