2021 Audi A5 2.0 TDI S Line

Overview

• Make: Audi
• Model: A5
• Trim: S Line
• Version: 2.0 TDI 35 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (161 bhp)
• Year: 2021
• Mileage: 54,000 miles
• Fuel: Diesel, mild hybrid
• Body: Hatchback, 5 doors, 5 seats
• Engine: 2.0 litres, 161 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 54,000 miles on the clock, this 2021 Audi A5 S Line has done roughly 3,000 more miles than a typical 2021 Audi A5. The AskCar estimate for this car is £19,822. It is priced at £18,999, which is £823 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 1,830 Audi A5 cars across different ages and specifications. We first recorded this advert 27 days ago, and its asking price has since fallen by £1,000. Its advertised mileage matches the government's MOT record. The seller is A & S Cars, based in Bishop's Stortford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £823 (4%) under the AskCar estimate of £19,822.

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 1,830 priced Audi A5 adverts across different ages and specifications, as of 2 November 2026.

A 2021 Audi A5 with the 2.0 diesel engine is typically advertised at £19,700: the median of the 119 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 Audi A5 has been on sale for at least 27 days.

Price history

AskCar first saw this advert on 6 October 2026 at £19,999. Its asking price is now £18,999, £1,000 less. The latest price cut was seen on 18 October 2026.

Price changes recorded:

• 6 October 2026: £19,999
• 9 October 2026: £19,850
• 11 October 2026: £19,799
• 13 October 2026: £19,499
• 18 October 2026: £18,999

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 10 May 2027.

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

There were no advisories at the latest test.

Mileage at that test: 51,486 miles, which matches the advertised 54,000 miles.

Advertised mileage is about 3,000 miles higher than the median mileage of a 2021 Audi A5 on AskCar.

Similar cars

30 other 2021 Audi A5 S Line 2.0 diesel automatic hatchbacks are for sale at UK dealers, from £13,995 to £22,990, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A5 S Line, 2.0 diesel hatchback, grey. Mileage: 53,000 miles. Price: £20,000, £1,001 more than this car. Dealer: Plympton Car Centre (Plymouth) in Plympton. AskCar page: https://askcar.co.uk/car/audi-a5-2021-bbc648e4f41c
• 2021 Audi A5 S Line, 2.0 diesel hatchback, blue. Mileage: 51,429 miles. Price: £21,798, £2,799 more than this car. Dealer: Arnold Clark Liverpool Motorstore / MG / Chery in Liverpool. AskCar page: https://askcar.co.uk/car/audi-a5-2021-630786cbeb5d
• 2021 Audi A5 S Line, 2.0 diesel hatchback, blue. Mileage: 51,000 miles. Price: £21,500, £2,501 more than this car. Dealer: PMA Cars NI in Newry. AskCar page: https://askcar.co.uk/car/audi-a5-2021-00c6bfd32934

• The nearest: 2021 Audi A5 S Line, 2.0 diesel hatchback, blue, 21 miles from this car. Mileage: 82,210 miles. Price: £16,450, £2,549 less than this car. Dealer: Car Planet Barnet in Barnet. AskCar page: https://askcar.co.uk/car/audi-a5-2021-9c6f94bffb32