2021 Audi A3 1.5 TFSI S Line
Version: 1.5 TFSI 35 S Line S tronic FWD Euro 6 (s/s) 4dr (148 bhp)
Price: £18,895. Fair price: £715 (3%) under the AskCar estimate of £19,610, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,600 priced Audi A3 adverts on AskCar as of 31 October 2026.
AskCar lists 6,729 used Audi A3 from 2,260 UK dealerships, as of 31 October 2026.
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)
- Mileage
- 29,030 miles
- Year
- 2021
- Fuel type
- Petrol
- Body type
- Saloon
- Engine
- 1.5 L
- Gearbox
- Automatic
- Power
- 148 bhp
- Seats
- 5
- CO2
- 131 g/km
- Colour
- Grey
- Doors
- 4
- Driven wheels
- Front Wheel Drive
- Gearbox version
- S tronic
- Engine badge
- TFSI
- Hybrid type
- Mild hybrid
- Emissions standard
- Euro 6
About this car
This 2021 Audi A3 S Line has covered 29,030 miles, around 14,300 fewer miles than is typical for its age. The dealer is asking £18,895, which is £715 below the AskCar estimate of £19,610. To work out the AskCar estimate, we analyse UK dealer adverts for 6,600 Audi A3 cars across different ages and specifications. We have tracked this advert today. MOT records show an expiry date of 22 March 2027, and the latest recorded mileage is consistent with the advert. The seller is V12 Sports & Classics Ltd - Hinckley, based in Hinckley.
Stock data as of 31 October 2026.
Price history
AskCar first saw this advert on 31 October 2026.
| Date observed | Asking price |
|---|---|
| 31 October 2026 | £18,895 |
Price and mileage comparison
Fair price: £715 (3%) under the AskCar estimate of £19,610.
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 6,600 priced Audi A3 adverts across different ages and specifications, as of 31 October 2026.
Advertised mileage is about 14,300 miles lower than the median mileage of a 2021 Audi A3 on AskCar.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 22 March 2027. 28,461 miles at the last test.
Other matching cars
97 other 2021 Audi A3 S Line automatic petrol cars are for sale at UK dealers from £11,990 to £21,995, as of 31 October 2026.
The 5 cheapest:
- 2021 Audi A3. Price: £11,990. Mileage: 111,668 miles. Dealer: Group 1 Assured Ipswich in Ipswich. AskCar page: https://askcar.co.uk/car/audi-a3-2021-7c559fe71ea8
- 2021 Audi A3. Price: £11,995. Mileage: 108,000 miles. Dealer: Dorset Vehicle Sales in Ferndown. AskCar page: https://askcar.co.uk/car/audi-a3-2021-4788a67b2034
- 2021 Audi A3. Price: £11,995. Mileage: 120,530 miles. Dealer: V12 Sports & Classics Ltd - Hinckley in Hinckley. AskCar page: https://askcar.co.uk/car/audi-a3-2021-b258977de54b
- 2021 Audi A3. Price: £12,999. Mileage: 57,000 miles. Dealer: Field Way Motors in Gerrards Cross. AskCar page: https://askcar.co.uk/car/audi-a3-2021-af825801f8b2
- 2021 Audi A3. Price: £13,290. Mileage: 108,000 miles. Dealer: Motor Zone Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a3-2021-1ac13350ca25
The 97 matching cars have covered 11,900 to 120,530 miles, compared with 29,030 miles for this car.
Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.
Browse all Audi A3 cars for sale · 2021 Audi A3 price guide
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Photos
31 photos of this car are on its AskCar page.
How to contact the dealer and its opening hours are on this AskCar page.
As of 31 October 2026, AskCar lists 583,548 cars and vans from 12,716 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.