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: 51,000 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: Blue
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A5 S Line is advertised with 51,000 miles on the clock. Priced at £21,500, it is advertised £1,360 above the AskCar estimate of £20,140. The AskCar estimate uses UK dealer asking prices, including 1,830 Audi A5 adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 38 days ago. Its asking price has since fallen by £1,000. The advertised mileage is lower than the latest MOT reading of 51,552 miles. Ask the dealer to explain. The latest recorded MOT expires on 21 June 2027. It is for sale at PMA Cars NI in Newry. 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: £1,360 (6%) over the AskCar estimate of £20,140.

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 38 days.

Price history

AskCar first saw this advert on 25 September 2026 at £22,500. Its asking price is now £21,500, £1,000 less. The latest price cut was seen on 9 October 2026.

Price changes recorded:

• 25 September 2026: £22,500
• 9 October 2026: £21,500

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 21 June 2027.

It has had 3 MOTs. The latest, on 22 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 51,552 miles. The advert says 51,000 miles, fewer than the MOT record, so ask the dealer which is right.

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, blue. Mileage: 51,429 miles. Price: £21,798, £298 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, white. Mileage: 49,578 miles. Price: £19,999, £1,501 less 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, grey. Mileage: 53,000 miles. Price: £20,000, £1,500 less than this car. Dealer: Plympton Car Centre (Plymouth) in Plympton. AskCar page: https://askcar.co.uk/car/audi-a5-2021-bbc648e4f41c

• The nearest: 2021 Audi A5 S Line, 2.0 diesel hatchback, white, 40 miles from this car. Mileage: 72,000 miles. Price: £20,495, £1,005 less than this car. Dealer: MC Autosales in Magherafelt. AskCar page: https://askcar.co.uk/car/audi-a5-2021-acefeb031022