2021 Audi A4 2.0 TDI S Line

Overview

• Make: Audi
• Model: A4
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
• Year: 2021
• Mileage: 64,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 160 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 S Line has covered 64,000 miles. Priced at £16,769, it is advertised £328 above the AskCar estimate of £16,441. To work out the AskCar estimate, we analyse UK dealer adverts for 1,428 Audi A4 cars across different ages and specifications. It first appeared in our advert records 4 days ago. The last MOT shows 64,685 miles, more than the advert. This is worth checking with the dealer. Its MOT is recorded as valid until 22 October 2027. The seller is Newarth Car Sales, based in Manchester. 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: £328 (2%) over the AskCar estimate of £16,441.

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 1,428 priced Audi A4 adverts across different ages and specifications, as of 2 November 2026.

A 2021 Audi A4 with the 2.0 diesel engine is typically advertised at £17,100: the median of the 95 for sale on AskCar, as of 2 November 2026.

Time on sale

AskCar first saw this 2021 Audi A4 advertised 4 days ago. About half of 2021 Audi A4 cars are gone from sale within a month of being advertised: 57 of the 115 first advertised between 11 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 29 October 2026 at £16,769. 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 22 October 2027.

It has had 3 MOTs. The latest, on 23 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 64,685 miles. The advert says 64,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 13,800 miles higher than the median mileage of a 2021 Audi A4 on AskCar.

Similar cars

16 other 2021 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £12,995 to £20,495, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 S Line, 2.0 diesel saloon, white. Mileage: 62,800 miles. Price: £16,693, £76 less than this car. Dealer: Aylesbury Trade Centre in Aston Clinton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-ed55683643f9
• 2021 Audi A4 S Line, 2.0 diesel saloon, black. Mileage: 62,284 miles. Price: £16,799, the same price as this car. Dealer: TU Motors in Luton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-d657172cf74a
• 2021 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 60,600 miles. Price: £17,250, £481 more than this car. Dealer: Igen Autos in Magherafelt. AskCar page: https://askcar.co.uk/car/audi-a4-2021-400b2694197e

• The nearest: 2021 Audi A4 S Line, 2.0 diesel saloon, blue, 12 miles from this car. Mileage: 56,988 miles. Price: £16,796, the same price as this car. Dealer: LSH Auto Mercedes-Benz of Stockport in Stockport. AskCar page: https://askcar.co.uk/car/audi-a4-2021-cbda5c14a28a