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: 40,699 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: 141 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 Avant S Line has covered 40,699 miles, around 19,000 fewer miles than is typical for its age. The dealer is asking £19,995, which is £775 below the AskCar estimate of £20,770. To work out the AskCar estimate, we analyse UK dealer adverts for 1,232 Audi A4 Avant cars across different ages and specifications. We first saw this car advertised 40 days ago. Its asking price has since fallen by £900. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by Victoria Motors in West Stour. 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: £775 (3%) under the AskCar estimate of £20,770.

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 40 days.

Price history

AskCar first saw this advert on 25 September 2026 at £20,895. Its asking price is now £19,995, £900 less. The latest price cut was seen on 15 October 2026.

Price changes recorded:

• 25 September 2026: £20,895
• 1 October 2026: £20,495
• 15 October 2026: £19,995

Mileage and MOT

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

It has had 2 MOTs. The latest, on 3 November 2025, passed.

Advisories at the latest test: front inner brake pad(s) wearing thin; rear inner brake pad(s) wearing thin.

Mileage at that test: 36,815 miles, which matches the advertised 40,699 miles.

Advertised mileage is about 19,000 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, black. Mileage: 42,000 miles. Price: £20,290, £295 more than this car. Dealer: Stratus in Basingstoke. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-5c4e0c48c174
• 2021 Audi A4 Avant S Line, 2.0 diesel estate, black. Mileage: 37,348 miles. Price: £22,000, £2,005 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: 35,650 miles. Price: £20,995, £1,000 more than this car. Dealer: Rodden Road Cars in Frome. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-a059a41f72c2