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: 108,000 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: Grey
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 Avant S Line has covered 108,000 miles, around 48,300 more miles than is typical for its age. The AskCar estimate for this car is £13,115. It is priced at £13,849, which is £734 above that estimate. The AskCar estimate uses 1,232 UK dealer adverts for the Audi A4 Avant, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 74 days ago. Its asking price has since fallen by £941. The recorded MOT expired on 27 July 2026, so ask the dealer whether it has been renewed. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Westley Motor Company in Birmingham. 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: £734 (5%) over the AskCar estimate of £13,115.

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 74 days.

Price history

AskCar first saw this advert on 22 August 2026 at £14,790. Its asking price is now £13,849, £941 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 22 August 2026: £14,790
• 3 September 2026: £14,570
• 11 September 2026: £14,500
• 13 September 2026: £14,460
• 22 September 2026: £14,290
• 8 October 2026: £14,179
• 14 October 2026: £13,989
• 21 October 2026: £13,898
• 4 November 2026: £13,849

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: the latest record we hold ran out on 27 July 2026; ask the dealer for the current MOT.

It has had 3 MOTs. The latest, on 16 July 2025, passed.

Advisories at the latest test: front tyre worn close to legal limit/worn on edge both; offside rear tyre worn close to legal limit/worn on edge on limit inner edge; offside rear tyre worn close to legal limit/worn on edge.

Mileage at that test: 82,519 miles, which matches the advertised 108,000 miles.

Advertised mileage is about 48,300 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 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 Avant S Line, 2.0 diesel estate, black. Mileage: 108,000 miles. Price: £13,995, £146 more 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, grey. Mileage: 100,767 miles. Price: £14,495, £646 more than this car. Dealer: Stirling Motors in St Ives. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-2796ffaa44e7
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, blue. Mileage: 90,002 miles. Price: £14,800, £951 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, blue, 18 miles from this car. Mileage: 31,041 miles. Price: £19,780, £5,931 more than this car. Dealer: Carsa Cannock in Cannock. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-0ba1228a6b50