2020 Audi A3 2.0 TDI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 2.0 TDI 35 S Line S tronic FWD Euro 6 (s/s) 5dr Sportback (148 bhp)
• Year: 2020
• Mileage: 50,521 miles
• Fuel: Diesel
• Body: Hatchback, 5 doors, 5 seats
• Engine: 2.0 litres, 148 bhp
• 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 50,521 miles. The dealer is asking £16,291, which is £1,167 below the AskCar estimate of £17,458. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. The asking price is now £700 lower than when we first recorded the advert 37 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Swansway Garages Swansway Honda Bolton, based in Bolton. 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: £1,167 (6%) under the AskCar estimate of £17,458.

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

This 2020 Audi A3 has been on sale for at least 37 days.

Price history

AskCar first saw this advert on 26 September 2026 at £16,991. Its asking price is now £16,291, £700 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 26 September 2026: £16,991
• 6 October 2026: £16,891
• 11 October 2026: £16,791
• 14 October 2026: £16,691
• 17 October 2026: £16,591
• 21 October 2026: £16,491
• 25 October 2026: £16,391
• 29 October 2026: £16,291

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 20 November 2026.

It has had 3 MOTs. The latest, on 8 November 2025, passed.

Advisories at the latest test: offside front tyre worn close to legal limit/worn on edge; offside rear tyre worn close to legal limit/worn on edge; nearside rear tyre worn close to legal limit/worn on edge.

Mileage at that test: 45,822 miles, which matches the advertised 50,521 miles.

Advertised mileage is about 100 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: 50,392 miles. Price: £17,300, £1,009 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: 55,645 miles. Price: £16,990, £699 more than this car. Dealer: One 2 One Autos in Windsor. AskCar page: https://askcar.co.uk/car/audi-a3-2020-6130a18165fb
• 2020 Audi A3 S Line, 2.0 diesel hatchback, grey. Mileage: 42,537 miles. Price: £16,950, £659 more than this car. Dealer: Group 1 Automotive Macclesfield Audi in Macclesfield. AskCar page: https://askcar.co.uk/car/audi-a3-2020-43079e6b608e

• The nearest: 2020 Audi A3 S Line, 2.0 diesel hatchback, white, 12 miles from this car. Mileage: 86,000 miles. Price: £13,795, £2,496 less than this car. Dealer: Dream Motor Specialist in Manchester. AskCar page: https://askcar.co.uk/car/audi-a3-2020-815d51fb7483