2020 Audi A3 2.0 TDI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 5dr
• Year: 2020
• Mileage: 55,645 miles
• Fuel: Diesel
• Body: Hatchback, 5 doors, 5 seats
• Engine: 2.0 litres
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 127 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 Audi A3 S Line has covered 55,645 miles, around 5,300 more miles than is typical for its age. Priced at £16,990, it is advertised £441 below the AskCar estimate of £17,431. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this car for sale 3 days ago. Its advertised mileage matches the government's MOT record. The seller is One 2 One Autos, based in Windsor. 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: £441 (2%) under the AskCar estimate of £17,431.

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 6,542 priced Audi A3 adverts across different ages and specifications, as of 2 November 2026.

A 2020 Audi A3 with the 2.0 diesel engine is typically advertised at £16,800: the median of the 52 for sale on AskCar, as of 2 November 2026.

Time on sale

AskCar first saw this 2020 Audi A3 advertised 3 days ago. About half of 2020 Audi A3 cars are gone from sale within a month of being advertised: 226 of the 433 first advertised between 8 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 30 October 2026 at £16,325. Its asking price is now £16,990, £665 more.

Price changes recorded:

• 30 October 2026: £16,325
• 31 October 2026: £16,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 7 July 2027.

It has had 4 MOTs. The latest, on 6 July 2026, passed.

Advisories at the latest test: nearside front tyre slightly damaged/cracking or perishing tyre outer side wall is heavily damaged - needs to be kept under observation; offside front tyre worn close to legal limit/worn on edge worn very close on the edges; offside tyre worn close to legal limit/worn on edge tyre has heavy wear on the edges; and 2 more.

Mileage at that test: 52,726 miles, which matches the advertised 55,645 miles.

Advertised mileage is about 5,300 miles higher than the median mileage of a 2020 Audi A3 on AskCar.

Similar cars

13 other 2020 Audi A3 S Line 2.0 diesel automatic hatchbacks are for sale at UK dealers, from £10,995 to £19,770, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2020 Audi A3 S Line, 2.0 diesel hatchback, black. Mileage: 50,521 miles. Price: £16,291, £699 less than this car. Dealer: Swansway Garages Swansway Honda Bolton in Bolton. AskCar page: https://askcar.co.uk/car/audi-a3-2020-10c7b9a13220
• 2020 Audi A3 S Line, 2.0 diesel hatchback, black. Mileage: 50,392 miles. Price: £17,300, £310 more than this car. Dealer: Sytner Select Northampton in Northampton. AskCar page: https://askcar.co.uk/car/audi-a3-2020-a0b4f5f99f2f
• 2020 Audi A3 S Line, 2.0 diesel hatchback, black. Mileage: 62,613 miles. Price: £16,299, £691 less than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a3-2020-290ce4dec3b0

• The nearest: 2020 Audi A3 S Line, 2.0 diesel hatchback, black, 28 miles from this car. Mileage: 96,706 miles. Price: £13,990, £3,000 less than this car. Dealer: Www.Countrycarsales.Co.Uk in Welwyn Garden City. AskCar page: https://askcar.co.uk/car/audi-a3-2020-0da304c2791b