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: 24,940 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

This 2021 Audi A5 S Line is advertised with 24,940 miles, approximately 25,200 below the typical mileage for its age. The AskCar estimate for this car is £23,129. It is priced at £23,990, which is £861 above that estimate. The AskCar estimate draws on 1,865 Audi A5 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 1 day ago. The government's MOT record matches its advertised mileage. You can find this car at Harwoods Southampton Audi in Chandlers Ford. 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: £861 (3%) over the AskCar estimate of £23,129.

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 1,865 priced Audi A5 adverts across different ages and specifications, as of 4 November 2026.

A 2021 Audi A5 with the 2.0 diesel engine is typically advertised at £19,700: the median of the 128 for sale on AskCar, as of 4 November 2026.

Time on sale

AskCar first saw this 2021 Audi A5 advertised 1 day ago. About half of 2021 Audi A5 cars are gone from sale within a month of being advertised: 89 of the 167 first advertised between 8 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 3 November 2026 at £23,990. 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 7 October 2027.

It has had 3 MOTs. The latest, on 8 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 24,515 miles, which matches the advertised 24,940 miles.

Advertised mileage is about 25,200 miles lower than the median mileage of a 2021 Audi A5 on AskCar.

Similar cars

34 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 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A5 S Line, 2.0 diesel hatchback, white. Mileage: 19,982 miles. Price: £19,995, £3,995 less than this car. Dealer: Oakwood Specialist Cars in Whitley Bay. AskCar page: https://askcar.co.uk/car/audi-a5-2021-7fae677e692d
• 2021 Audi A5 S Line, 2.0 diesel hatchback, white. Mileage: 17,325 miles. Price: £22,990, £1,000 less than this car. Dealer: Riverside SEAT CUPRA in Hessle. AskCar page: https://askcar.co.uk/car/audi-a5-2021-d03f7c326d98
• 2021 Audi A5 S Line, 2.0 diesel hatchback, white. Mileage: 33,094 miles. Price: £20,440, £3,550 less than this car. Dealer: Evans Halshaw Citroen Hull in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/audi-a5-2021-70c0b06044e9

• The nearest: 2021 Audi A5 S Line, 2.0 diesel hatchback, white, 5 miles from this car. Mileage: 57,249 miles. Price: £16,990, £7,000 less than this car. Dealer: Nexa Motor Group in Southampton. AskCar page: https://askcar.co.uk/car/audi-a5-2021-816ff2fa2033