2020 BMW 4 Series Gran Coupe 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series Gran Coupe
• Trim: M Sport
• Version: 2.0 420i GPF M Sport Auto RWD Euro 6 (s/s) 5dr (181 bhp)
• Year: 2020
• Mileage: 20,680 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 135 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 BMW 4 Series Gran Coupe M Sport has covered 20,680 miles, around 34,800 fewer miles than is typical for its age. Its asking price of £18,450 is £238 below the AskCar estimate of £18,688. To work out the AskCar estimate, we analyse UK dealer adverts for 1,174 BMW 4 Series Gran Coupe cars across different ages and specifications. We first recorded this advert 29 days ago, and its asking price has since fallen by £600. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by Car Planet Watford in Rickmansworth. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Fair price: £238 (1%) under the AskCar estimate of £18,688.

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 1,174 priced BMW 4 Series Gran Coupe adverts across different ages and specifications, as of 7 November 2026.

A 2020 BMW 4 Series Gran Coupe with the 2.0 petrol engine is typically advertised at £16,000: the median of the 56 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2020 BMW 4 Series Gran Coupe has been on sale for at least 29 days.

Price history

AskCar first saw this advert on 9 October 2026 at £19,050. Its asking price is now £18,450, £600 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 9 October 2026: £19,050
• 21 October 2026: £18,900
• 28 October 2026: £18,600
• 3 November 2026: £18,450

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 9 March 2027.

It has had 4 MOTs. The latest, on 2 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 18,978 miles, which matches the advertised 20,680 miles.

Advertised mileage is about 34,800 miles lower than the median mileage of a 2020 BMW 4 Series Gran Coupe on AskCar.

Similar cars

22 other 2020 BMW 4 Series Gran Coupe M Sport 2.0 petrol automatic hatchbacks are for sale at UK dealers, from £11,495 to £19,850, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, black. Mileage: 19,206 miles. Price: £19,850, £1,400 more than this car. Dealer: Sytner Land Rover Conwy in Conwy. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2020-c19491f67622
• 2020 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, grey. Mileage: 26,100 miles. Price: £17,499, £951 less than this car. Dealer: K Motors London in New Malden. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2020-9421ee076b12
• 2020 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, white. Mileage: 32,760 miles. Price: £17,295, £1,155 less than this car. Dealer: V12 Sports & Classics Ltd -Worksop in Worksop. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2020-4c05dfb5a163

• The nearest: 2020 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, grey, 5 miles from this car. Mileage: 59,500 miles. Price: £15,990, £2,460 less than this car. Dealer: M&C Specialist Motors in Abbots Langley. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2020-5c095b699130