2021 Audi A4 2.0 TDI S Line

Overview

• Make: Audi
• Model: A4
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
• Year: 2021
• Mileage: 36,209 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 160 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 S Line has covered 36,209 miles, around 14,000 fewer miles than is typical for its age. The AskCar estimate for this car is £19,178. It is priced at £18,995, which is £183 below that estimate. The AskCar estimate uses UK dealer asking prices, including 1,427 Audi A4 adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert today. Our latest MOT record expired on 29 October 2026. Check the current position with the dealer. We checked its advertised mileage against the government's MOT record, and they match. The seller is North Loop Autohaus, based in Droitwich. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £183 (under 1%) under the AskCar estimate of £19,178.

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 1,427 priced Audi A4 adverts across different ages and specifications, as of 5 November 2026.

A 2021 Audi A4 with the 2.0 diesel engine is typically advertised at £17,100: the median of the 95 for sale on AskCar, as of 5 November 2026.

Time on sale

AskCar first saw this 2021 Audi A4 advertised today. About half of 2021 Audi A4 cars are gone from sale within a month of being advertised: 58 of the 125 first advertised between 11 July 2026 and 2 October 2026.

Price history

AskCar first saw this advert on 5 November 2026 at £18,995. 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 5 November 2026: the latest record we hold ran out on 29 October 2026; ask the dealer for the current MOT.

It failed its MOT on 27 October 2025 (offside front inner tyre has a bulge, caused by separation or partial failure of its structure approx 3/4 of sidewall) and passed 3 days later, on 30 October 2025.

There were no advisories at the latest test.

Mileage at that test: 32,001 miles, which matches the advertised 36,209 miles.

Advertised mileage is about 14,000 miles lower than the median mileage of a 2021 Audi A4 on AskCar.

Similar cars

17 other 2021 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £12,995 to £20,495, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 36,347 miles. Price: £19,495, £500 more than this car. Dealer: Lookers Audi Hamilton in Hamilton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-4d7a04745f52
• 2021 Audi A4 S Line, 2.0 diesel saloon, blue. Mileage: 37,000 miles. Price: £17,995, £1,000 less than this car. Dealer: Auto 2000 in Havering. AskCar page: https://askcar.co.uk/car/audi-a4-2021-6e30f932d50e
• 2021 Audi A4 S Line, 2.0 diesel saloon, blue. Mileage: 38,930 miles. Price: £17,999, £996 less than this car. Dealer: Motorpoint Edinburgh in Edinburgh. AskCar page: https://askcar.co.uk/car/audi-a4-2021-3eec8a99717c

• The nearest: 2021 Audi A4 S Line, 2.0 diesel saloon, white, 54 miles from this car. Mileage: 78,000 miles. Price: £15,000, £3,995 less than this car. Dealer: Mylson Stoke in Newcastle-under-Lyme. AskCar page: https://askcar.co.uk/car/audi-a4-2021-a2ad2dde85f8