2023 Audi A4 2.0 TDI S Line
Price: £20,800. Fair price: £629 (2%) under the AskCar estimate of £21,429, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,428 priced Audi A4 adverts on AskCar as of 2 November 2026.
AskCar lists 1,493 used Audi A4 from 984 UK dealerships, as of 2 November 2026.
Overview
- Make: Audi
- Model: A4
- Trim: S Line
- Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
- Year: 2023
- Mileage: 30,691 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
The advertised mileage for this 2023 Audi A4 S Line is 30,691 miles. Its asking price of £20,800 is £629 below the AskCar estimate of £21,429. The AskCar estimate draws on 1,428 Audi A4 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 8 days ago. Its advertised mileage matches the government's MOT record. It is for sale at Car Planet Watford in Rickmansworth. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 2 November 2026.
Price
Fair price: £629 (2%) under the AskCar estimate of £21,429.
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 2023 Audi A4 with the 2.0 diesel engine is typically advertised at £20,900: the median of the 206 for sale on AskCar, as of 2 November 2026.
Time on sale
This 2023 Audi A4 has been on sale for at least 8 days.
Price history
AskCar first saw this advert on 25 October 2026 at £20,800. 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 29 September 2027.
It has had one MOT, on 15 September 2026, and passed.
There were no advisories at the latest test.
Mileage at that test: 28,477 miles, which matches the advertised 30,691 miles.
Advertised mileage is about 2,000 miles higher than the median mileage of a 2023 Audi A4 on AskCar.
Similar cars
16 other 2023 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £19,483 to £31,995, as of 2 November 2026.
The 3 closest to this car in mileage:
- 2023 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 30,816 miles. Price: £20,421, £379 less than this car. Dealer: Carbase Bristol in Bristol. AskCar page: https://askcar.co.uk/car/audi-a4-2023-2b552d168271
- 2023 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 31,000 miles. Price: £21,200, £400 more than this car. Dealer: Mon Motors Cardiff Audi in Cardiff. AskCar page: https://askcar.co.uk/car/audi-a4-2023-dd9b03a587f7
- 2023 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 31,143 miles. Price: £20,700, £100 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a4-2023-7c47b978c1ff
Browse all Audi A4 cars for sale · 2023 Audi A4 price guide
More like this
- Used Audi A4 S Line prices
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- Used diesel Audi A4 for sale
- Used Audi A4 for sale near Watford
Photos
1 photo of this car is 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.