2021 Audi A4 2.0 TFSI S Line

Overview

• Make: Audi
• Model: A4
• Trim: S Line
• Version: 2.0 TFSI 40 S Line S tronic FWD Euro 6 (s/s) 4dr (201 bhp)
• Year: 2021
• Mileage: 15,297 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 155 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 S Line is advertised with 15,297 miles, approximately 34,900 below the typical mileage for its age. The AskCar estimate for this car is £20,612. It is priced at £21,745, which is £1,133 above that estimate. The AskCar estimate draws on 1,427 Audi A4 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 42 days ago. Its asking price has since fallen by £2,250. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Group 1 Automotive Chingford Audi, based in Chingford. 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: £1,133 (5%) over the AskCar estimate of £20,612.

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 £23,995. Its asking price is now £21,745, £2,250 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 23 September 2026: £23,995
• 8 October 2026: £23,445
• 14 October 2026: £22,999
• 25 October 2026: £21,945
• 4 November 2026: £21,745

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 27 September 2027.

It has had 3 MOTs. The latest, on 11 September 2026, passed.

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

Mileage at that test: 15,167 miles, which matches the advertised 15,297 miles.

Advertised mileage is about 34,900 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 £19,999, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 S Line, 2.0 petrol saloon, black. Mileage: 25,865 miles. Price: £17,100, £4,645 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a4-2021-8f18484fdadf
• 2021 Audi A4 S Line, 2.0 petrol saloon, grey. Mileage: 27,162 miles. Price: £18,200, £3,545 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a4-2021-b955fd89d49e
• 2021 Audi A4 S Line, 2.0 petrol saloon, white. Mileage: 33,568 miles. Price: £19,999, £1,746 less than this car. Dealer: Bridgend Motor Group in Gateshead. AskCar page: https://askcar.co.uk/car/audi-a4-2021-3dc8fc35c99a

• The nearest: 2021 Audi A4 S Line, 2.0 petrol saloon, grey, 16 miles from this car. Mileage: 72,259 miles. Price: £15,000, £6,745 less than this car. Dealer: Fusion Motors in Grays. AskCar page: https://askcar.co.uk/car/audi-a4-2021-8ab7aa4bdf79