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: 46,135 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: Black
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A5 S Line is advertised with 46,135 miles, approximately 4,900 below the typical mileage for its age. Its asking price of £19,583 is £1,085 below the AskCar estimate of £20,668. 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 48 days ago. Its asking price has since fallen by £780. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Lookers Audi Guildford, based in Guildford. 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: £1,085 (5%) under the AskCar estimate of £20,668.

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 48 days.

Price history

AskCar first saw this advert on 15 September 2026 at £20,363. Its asking price is now £19,583, £780 less. The latest price cut was seen on 2 November 2026.

Price changes recorded:

• 15 September 2026: £20,363
• 16 September 2026: £20,653
• 21 October 2026: £20,199
• 23 October 2026: £19,881
• 2 November 2026: £19,583

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 28 September 2027.

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

Advisories at the latest test: offside rear rear reflector defective or damaged by up to 50% of the reflecting surface.

Mileage at that test: 45,684 miles, which matches the advertised 46,135 miles.

Advertised mileage is about 4,900 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, blue. Mileage: 43,957 miles. Price: £19,495, £88 less than this car. Dealer: Vertu Peugeot Oxford in Oxford. AskCar page: https://askcar.co.uk/car/audi-a5-2021-6d2730d9e475
• 2021 Audi A5 S Line, 2.0 diesel hatchback, white. Mileage: 48,707 miles. Price: £18,730, £853 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, £333 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, 17 miles from this car. Mileage: 75,492 miles. Price: £18,699, £884 less than this car. Dealer: cinch Bellevue in Hook. AskCar page: https://askcar.co.uk/car/audi-a5-2021-997ff71f3c05