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: 43,957 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: Blue
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 43,957 miles, this 2021 Audi A5 S Line has covered about 7,000 fewer miles than other 2021 Audi A5 cars. Its asking price of £19,495 is £1,413 below the AskCar estimate of £20,908. To work out the AskCar estimate, we analyse UK dealer adverts for 1,830 Audi A5 cars across different ages and specifications. The dealer may accept less: this car has been on sale for at least 81 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Vertu Peugeot Oxford, based in Oxford. 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: £1,413 (6%) under the AskCar estimate of £20,908.

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

The dealer may accept less. This 2021 Audi A5 has been on sale for at least 81 days. About half of 2021 Audi A5 cars are gone from sale within a month of being advertised: 84 of the 157 first advertised between 8 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 13 August 2026 at £20,442. Its asking price is now £19,495, £947 less.

Price changes recorded:

• 14 August 2026: £20,442
• 16 August 2026: £20,454
• 18 August 2026: £21,017
• 20 August 2026: £21,003
• 21 August 2026: £20,995
• 22 August 2026: £20,994
• 29 August 2026: £20,992
• 30 August 2026: £20,984
• 1 September 2026: £20,980
• 2 September 2026: £20,939
• 6 September 2026: £20,920
• 8 September 2026: £20,859
• 14 October 2026: £19,915
• 15 October 2026: £20,056
• 17 October 2026: £20,092
• 25 October 2026: £19,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 5 January 2027.

It has had 3 MOTs. The latest, on 2 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 37,702 miles, which matches the advertised 43,957 miles.

Advertised mileage is about 7,000 miles lower 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, black. Mileage: 46,135 miles. Price: £19,583, £88 more than this car. Dealer: Lookers Audi Guildford in Guildford. AskCar page: https://askcar.co.uk/car/audi-a5-2021-11e01a0446f9
• 2021 Audi A5 S Line, 2.0 diesel hatchback, white. Mileage: 48,707 miles. Price: £18,730, £765 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/audi-a5-2021-9934767684f7
• 2021 Audi A5 S Line, 2.0 diesel hatchback, white. Mileage: 48,785 miles. Price: £19,250, £245 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a5-2021-d131515fdce8

• The nearest: 2021 Audi A5 S Line, 2.0 diesel hatchback, white, 34 miles from this car. Mileage: 75,492 miles. Price: £18,699, £796 less than this car. Dealer: cinch Bellevue in Hook. AskCar page: https://askcar.co.uk/car/audi-a5-2021-997ff71f3c05