2020 Audi A3 1.5 TFSI S Line

Overview

• Make: Audi
• Model: A3
• Trim: S Line
• Version: 1.5 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 4dr (148 bhp)
• Year: 2020
• Mileage: 4,600 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 1.5 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 131 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 Audi A3 S Line is advertised with 4,600 miles on the clock. Priced at £21,200, it is advertised £800 below the AskCar estimate of £22,000. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. We have tracked this advert for 1 day. The advertised mileage is lower than the latest MOT reading of 45,424 miles. Ask the dealer to explain. Its recorded MOT is valid until 19 October 2027. The seller is Marshall Motor Group Bexley Audi, based in Bexley. 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: £800 (3%) under the AskCar estimate of £22,000.

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 1.5 petrol engine is typically advertised at £16,000: the median of the 134 for sale on AskCar, as of 2 November 2026.

Time on sale

AskCar first saw this 2020 Audi A3 advertised 1 day 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 1 November 2026 at £21,200. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 19 October 2027.

It failed its MOT on 17 October 2026 (offside front tyre has a cut in excess of the requirements deep enough to reach the ply or cords 225/40/18) and passed later the same day.

Advisories at the latest test: rear registration plate deteriorated but not likely to be misread.

Mileage at that test: 45,424 miles. The advert says 4,600 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 45,800 miles lower than the median mileage of a 2020 Audi A3 on AskCar.

Similar cars

12 other 2020 Audi A3 S Line 1.5 petrol automatic saloons are for sale at UK dealers, from £13,990 to £18,900, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2020 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 22,000 miles. Price: £16,990, £4,210 less than this car. Dealer: Swift Cars in Blackwood. AskCar page: https://askcar.co.uk/car/audi-a3-2020-95135ff8fcdb
• 2020 Audi A3 S Line, 1.5 petrol saloon, blue. Mileage: 35,520 miles. Price: £16,195, £5,005 less than this car. Dealer: V12 Sports & Classics Ltd -Worksop in Worksop. AskCar page: https://askcar.co.uk/car/audi-a3-2020-1fac43c63c98
• 2020 Audi A3 S Line, 1.5 petrol saloon, grey. Mileage: 36,684 miles. Price: £18,900, £2,300 less than this car. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/audi-a3-2020-47bd0de1a310

• The nearest: 2020 Audi A3 S Line, 1.5 petrol saloon, blue, 27 miles from this car. Mileage: 51,334 miles. Price: £14,450, £6,750 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a3-2020-edda87edf116