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: 100,767 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: Grey
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 100,767 miles, this 2021 Audi A4 Avant S Line has covered about 41,000 more miles than other 2021 Audi A4 Avant cars. Priced at £14,495, it is advertised £712 above the AskCar estimate of £13,783. 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. It first appeared in our advert records 10 days ago. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at Stirling Motors in St. Ives, Cambridgeshire. 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

Fair price: £712 (5%) over the AskCar estimate of £13,783.

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 10 days.

Price history

AskCar first saw this advert on 25 October 2026 at £14,495. 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 19 October 2027.

It has had 3 MOTs. The latest, on 20 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 100,766 miles, which matches the advertised 100,767 miles.

Advertised mileage is about 41,000 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 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 Avant S Line, 2.0 diesel estate, grey. Mileage: 108,000 miles. Price: £13,849, £646 less than this car. Dealer: Westley Motor Company in Birmingham. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-a6013213f90b
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, black. Mileage: 108,000 miles. Price: £13,995, £500 less than this car. Dealer: Enzo Cars & Vans in Blackburn. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-8873dff9afb5
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, blue. Mileage: 90,002 miles. Price: £14,800, £305 more than this car. Dealer: Marshall Volkswagen Newbury in Newbury. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-90de791d49fe

• The nearest: 2021 Audi A4 Avant S Line, 2.0 diesel estate, black, 48 miles from this car. Mileage: 179,190 miles. Price: £8,999, £5,496 less than this car. Dealer: Dereham Motor Company in Dereham. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-cb78a17bd4eb