2021 Audi A3 1.4 TFSIe S Line Competition

Version: 1.4 13kWh TFSIe 45 S Line Competition S tronic FWD Euro 6 (s/s) 5dr Sportback (242 bhp)

Price: £15,991. Fair price: £54 (under 1%) over the AskCar estimate of £15,937, 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 Competition
Version
1.4 13kWh TFSIe 45 S Line Competition S tronic FWD Euro 6 (s/s) 5dr Sportback (242 bhp)
Mileage
72,032 miles
Year
2021
Fuel type
Plug-in hybrid (petrol)
Body type
Hatchback
Engine
1.4 L
Gearbox
Automatic
Power
242 bhp
Seats
5
CO2
30 g/km
Colour
Black
Doors
5
Driven wheels
Front Wheel Drive
Gearbox version
S tronic
Engine badge
TFSIe
Hybrid type
Plug-in hybrid
Emissions standard
Euro 6

About this car

At 72,032 miles, this 2021 Audi A3 S Line Competition has covered about 28,700 more miles than other 2021 Audi A3 cars. The dealer is asking £15,991, which is £54 above the AskCar estimate of £15,937. To work out the AskCar estimate, we analyse UK dealer adverts for 6,600 Audi A3 cars across different ages and specifications. We first recorded this car for sale today. Its recorded MOT is valid until 26 October 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Cardiff Trade Sales, based in Cardiff.

Stock data as of 31 October 2026.

How we estimate prices and check cars

Price history

AskCar first saw this advert on 31 October 2026.

Recorded asking prices
Date observedAsking price
31 October 2026£15,991

Price and mileage comparison

Fair price: £54 (under 1%) over the AskCar estimate of £15,937.

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 28,700 miles higher 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 26 October 2027. 72,032 miles at the last test.

Other matching cars

7 other 2021 Audi A3 S Line Competition automatic plug-in hybrids (petrol) are for sale at UK dealers from £13,000 to £21,450, as of 31 October 2026.

The 5 cheapest:

The 7 matching cars have covered 10,000 to 113,000 miles, compared with 72,032 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

More like this

Photos

33 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.