2021 Audi A3 1.0 TFSI S Line
Price: £19,995. Above the going rate: £1,498 (8%) over the AskCar estimate of £18,497, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,542 priced Audi A3 adverts on AskCar as of 2 November 2026.
AskCar lists 6,720 used Audi A3 from 2,302 UK dealerships, as of 2 November 2026.
Overview
- Make: Audi
- Model: A3
- Trim: S Line
- Version: 1.0 30 TFSI S Line S tronic FWD Euro 6 4dr (108 bhp)
- Year: 2021
- Mileage: 28,000 miles
- Fuel: Petrol, mild hybrid
- Body: Saloon, 4 doors, 5 seats
- Engine: 1.0 litres, 108 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: Black
- CO2: 120 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Audi A3 S Line is advertised with 28,000 miles, approximately 15,600 below the typical mileage for its age. Its asking price of £19,995 is £1,498 above the AskCar estimate of £18,497. The AskCar estimate uses 6,542 UK dealer adverts for the Audi A3, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 12 days. It is for sale at Prestigio Motor Company in Watford. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 2 November 2026.
Price
Above the going rate: £1,498 (8%) over the AskCar estimate of £18,497.
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 2021 Audi A3 with the 1.0 petrol engine is typically advertised at £15,000: the median of the 87 for sale on AskCar, as of 2 November 2026.
Time on sale
This 2021 Audi A3 has been on sale for at least 12 days.
Price history
AskCar first saw this advert on 21 October 2026 at £19,995. Its asking price has not changed.
Mileage and MOT
Advertised mileage is about 15,600 miles lower than the median mileage of a 2021 Audi A3 on AskCar.
Similar cars
5 other 2021 Audi A3 S Line 1.0 petrol automatic saloons are for sale at UK dealers, from £16,190 to £18,498, as of 2 November 2026.
The 3 closest to this car in mileage:
- 2021 Audi A3 S Line, 1.0 petrol saloon, black. Mileage: 27,468 miles. Price: £18,498, £1,497 less than this car. Dealer: Arnold Clark Glasgow Kia / OMODA / JAECOO in Glasgow. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1230d337dcb5
- 2021 Audi A3 S Line, 1.0 petrol saloon, white. Mileage: 39,230 miles. Price: £17,599, £2,396 less than this car. Dealer: Fords Of Winsford Car Supermarket in Winsford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-41bd291aee1e
- 2021 Audi A3 S Line, 1.0 petrol saloon, white. Mileage: 40,230 miles. Price: £17,150, £2,845 less than this car. Dealer: Group 1 Automotive Chingford Audi in Chingford. AskCar page: https://askcar.co.uk/car/audi-a3-2021-7c523805809a
Browse all Audi A3 cars for sale · 2021 Audi A3 price guide
More like this
- Used Audi A3 S Line prices
- Used Audi A3 for sale under £20,000
- Used automatic Audi A3 for sale
- Used petrol Audi A3 for sale
- Used Audi A3 for sale near Watford
Photos
15 photos of this car are on its AskCar page.
As of 2 November 2026, AskCar lists 586,270 cars and vans from 12,920 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.