2021 Audi A3 1.4 TFSIe S Line Competition

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)
• Year: 2021
• Mileage: 72,032 miles
• Fuel: Plug-in hybrid (petrol)
• Body: Hatchback, 5 doors, 5 seats
• Engine: 1.4 litres, 242 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 30 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 72,032 miles, this 2021 Audi A3 S Line Competition has covered about 28,400 more miles than other 2021 Audi A3 cars. The dealer is asking £15,991, which is £250 above the AskCar estimate of £15,741. To work out the AskCar estimate, we analyse UK dealer adverts for 6,542 Audi A3 cars across different ages and specifications. This car was first seen in our listings data 2 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Cardiff Trade Sales, based in Cardiff. 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: £250 (1%) over the AskCar estimate of £15,741.

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 1.4 plug-in hybrid engine is typically advertised at £15,900: the median of the 77 for sale on AskCar, as of 2 November 2026.

Time on sale

AskCar first saw this 2021 Audi A3 advertised 2 days ago. About 6 in 10 of 2021 Audi A3 cars are gone from sale within a month of being advertised: 403 of the 709 first advertised between 7 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 31 October 2026 at £15,991. 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 26 October 2027.

It has had 3 MOTs. The latest, on 27 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 72,032 miles, which matches the advertised 72,032 miles.

Advertised mileage is about 28,400 miles higher than the median mileage of a 2021 Audi A3 on AskCar.

Similar cars

6 other 2021 Audi A3 S Line Competition 1.4 plug-in hybrid automatic hatchbacks are for sale at UK dealers, from £13,000 to £21,295, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A3 S Line Competition, 1.4 plug-in hybrid hatchback, grey. Mileage: 75,605 miles. Price: £15,570, £421 less than this car. Dealer: Evans Halshaw BYD Rotherham in Rotherham. AskCar page: https://askcar.co.uk/car/audi-a3-2021-a4a69cc1e7ec
• 2021 Audi A3 S Line Competition, 1.4 plug-in hybrid hatchback, white. Mileage: 48,768 miles. Price: £18,498, £2,507 more than this car. Dealer: Arnold Clark Benton Chery in Benton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-eb2bebedc011
• 2021 Audi A3 S Line Competition, 1.4 plug-in hybrid hatchback, black. Mileage: 113,000 miles. Price: £13,000, £2,991 less than this car. Dealer: Car Solutions Bedfordshire in Luton. AskCar page: https://askcar.co.uk/car/audi-a3-2021-e493583a0659

• The nearest: 2021 Audi A3 S Line Competition, 1.4 plug-in hybrid hatchback, white, 62 miles from this car. Mileage: 22,056 miles. Price: £20,900, £4,909 more than this car. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/audi-a3-2021-8bedd48d14ed