2021 Audi A4 2.0 TFSI S Line

Overview

• Make: Audi
• Model: A4
• Trim: S Line
• Version: 2.0 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 4dr (148 bhp)
• Year: 2021
• Mileage: 47,400 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 154 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 47,400 miles, this 2021 Audi A4 S Line has covered about 2,800 fewer miles than other 2021 Audi A4 cars. The AskCar estimate for this car is £16,755. It is priced at £17,490, which is £735 above that estimate. The AskCar estimate uses 1,427 UK dealer adverts for the Audi A4, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 42 days ago, the asking price has dropped by £500. The government's MOT record matches its advertised mileage. It is advertised by Stow Car Company in Chelmsford. 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: £735 (4%) over the AskCar estimate of £16,755.

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 4 November 2026.

A 2021 Audi A4 with the 2.0 petrol engine is typically advertised at £17,100: the median of the 95 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 Audi A4 has been on sale for at least 42 days.

Price history

AskCar first saw this advert on 23 September 2026 at £17,990. Its asking price is now £17,490, £500 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 23 September 2026: £17,990
• 27 October 2026: £17,490

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 1 August 2027.

It has had 3 MOTs. The latest, on 21 July 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 46,540 miles, which matches the advertised 47,400 miles.

Advertised mileage is about 2,800 miles lower than the median mileage of a 2021 Audi A4 on AskCar.

Similar cars

6 other 2021 Audi A4 S Line 2.0 petrol automatic saloons are for sale at UK dealers, from £15,000 to £21,745, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 S Line, 2.0 petrol saloon, blue. Mileage: 48,709 miles. Price: £17,498, the same price as this car. Dealer: Arnold Clark Lenzie Vauxhall in Lenzie. AskCar page: https://askcar.co.uk/car/audi-a4-2021-baed951e7b4c
• 2021 Audi A4 S Line, 2.0 petrol saloon, white. Mileage: 33,568 miles. Price: £19,999, £2,509 more than this car. Dealer: Bridgend Motor Group in Gateshead. AskCar page: https://askcar.co.uk/car/audi-a4-2021-3dc8fc35c99a
• 2021 Audi A4 S Line, 2.0 petrol saloon, grey. Mileage: 27,162 miles. Price: £18,200, £710 more than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a4-2021-b955fd89d49e

• The nearest: 2021 Audi A4 S Line, 2.0 petrol saloon, grey, 21 miles from this car. Mileage: 72,259 miles. Price: £15,000, £2,490 less than this car. Dealer: Fusion Motors in Grays. AskCar page: https://askcar.co.uk/car/audi-a4-2021-8ab7aa4bdf79