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: 48,785 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 48,785 miles, approximately 2,200 below the typical mileage for its age. The AskCar estimate for this car is £20,379. It is priced at £19,250, which is £1,129 below that estimate. The AskCar estimate draws on 1,830 Audi A5 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 24 days ago. Its asking price has since fallen by £350. The government's MOT record matches its advertised mileage. It is advertised by Car Planet Watford in Rickmansworth. 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: £1,129 (5%) under the AskCar estimate of £20,379.

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 24 days.

Price history

AskCar first saw this advert on 9 October 2026 at £19,600. Its asking price is now £19,250, £350 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

• 9 October 2026: £19,600
• 23 October 2026: £19,550
• 30 October 2026: £19,250

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 14 September 2027.

It has had 4 MOTs. The latest, on 14 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 48,498 miles, which matches the advertised 48,785 miles.

Advertised mileage is about 2,200 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, white. Mileage: 48,707 miles. Price: £18,730, £520 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: 49,578 miles. Price: £19,999, £749 more than this car. Dealer: Bridgend Motor Group in Morley. AskCar page: https://askcar.co.uk/car/audi-a5-2021-0cb292798da0
• 2021 Audi A5 S Line, 2.0 diesel hatchback, blue. Mileage: 51,000 miles. Price: £21,500, £2,250 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, grey, 12 miles from this car. Mileage: 60,000 miles. Price: £18,989, £261 less than this car. Dealer: Bluehawk Automotive in Hounslow. AskCar page: https://askcar.co.uk/car/audi-a5-2021-ae384bc46f1d