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: 51,190 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: White
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 Avant S Line is advertised with 51,190 miles, approximately 8,500 below the typical mileage for its age. Priced at £17,990, it is advertised £362 below the AskCar estimate of £18,352. 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 recorded this advert 54 days ago, and its asking price has since fallen by £1,000. Its advertised mileage matches the government's MOT record. The seller is Quattro Tech Cars, based in St Ives. 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: £362 (1%) under the AskCar estimate of £18,352.

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

This 2021 Audi A4 Avant has been on sale for at least 54 days.

Price history

AskCar first saw this advert on 11 September 2026 at £18,990. Its asking price is now £17,990, £1,000 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 11 September 2026: £18,990
• 29 September 2026: £18,490
• 3 November 2026: £17,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 28 January 2027.

It has had 4 MOTs. The latest, on 29 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 47,549 miles, which matches the advertised 51,190 miles.

Advertised mileage is about 8,500 miles lower 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 £17,193 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, £457 less 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: 39,000 miles. Price: £18,995, £1,005 more than this car. Dealer: GT Motors in Saffron Walden. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-152cd45d635b
• 2021 Audi A4 Avant S Line, 2.0 petrol estate, black. Mileage: 37,139 miles. Price: £21,995, £4,005 more than this car. Dealer: JMS Cars in Staines. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-54021a407932