2021 Audi A4 Avant 2.0 TFSI S Line

Overview

• Make: Audi
• Model: A4 Avant
• Trim: S Line
• Version: 2.0 TFSI 40 S Line S tronic FWD Euro 6 (s/s) 5dr (201 bhp)
• Year: 2021
• Mileage: 68,108 miles
• Fuel: Petrol, mild hybrid
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 68,108 miles on the clock, this 2021 Audi A4 Avant S Line has done roughly 8,400 more miles than a typical 2021 Audi A4 Avant. The dealer is asking £17,193, which is £748 above the AskCar estimate of £16,445. To work out the AskCar estimate, we analyse UK dealer adverts for 1,232 Audi A4 Avant cars across different ages and specifications. It first appeared in our advert records today. Its advertised mileage matches the government's MOT record. It is advertised by Cargem in Rainham. 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: £748 (4%) over the AskCar estimate of £16,445.

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 petrol engine is typically advertised at £18,500: the median of the 95 for sale on AskCar, as of 4 November 2026.

Time on sale

AskCar first saw this 2021 Audi A4 Avant advertised today. About 4 in 10 of 2021 Audi A4 Avant cars are gone from sale within a month of being advertised: 48 of the 109 first advertised between 11 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 4 November 2026 at £17,193. 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 4 November 2026: valid until 4 December 2026.

It has had 4 MOTs. The latest, on 27 November 2025, 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; offside rear tyre worn close to legal limit/worn on edge.

Mileage at that test: 58,192 miles, which matches the advertised 68,108 miles.

Advertised mileage is about 8,400 miles higher than the median mileage of a 2021 Audi A4 Avant on AskCar.

Similar cars

5 other 2021 Audi A4 Avant S Line 2.0 petrol automatic estates are for sale at UK dealers, from £17,533 to £21,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 Avant S Line, 2.0 petrol estate, black. Mileage: 60,311 miles. Price: £17,533, £340 more than this car. Dealer: Carsa Gloucester in Gloucester. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-d87d9b7685b3
• 2021 Audi A4 Avant S Line, 2.0 petrol estate, white. Mileage: 51,190 miles. Price: £17,990, £797 more than this car. Dealer: Quattro Tech Cars in St Ives. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-67eaabc0f044
• 2021 Audi A4 Avant S Line, 2.0 petrol estate, white. Mileage: 39,000 miles. Price: £18,995, £1,802 more than this car. Dealer: GT Motors in Saffron Walden. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-152cd45d635b

• The nearest: 2021 Audi A4 Avant S Line, 2.0 petrol estate, black, 31 miles from this car. Mileage: 37,139 miles. Price: £21,995, £4,802 more than this car. Dealer: JMS Cars in Staines. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-54021a407932