2020 BMW 8 Series 3.0 840i M Sport

Overview

• Make: BMW
• Model: 8 Series
• Trim: M Sport
• Version: 3.0 840i M Sport Steptronic RWD Euro 6 (s/s) 2dr (328 bhp)
• Year: 2020
• Mileage: 56,298 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 328 bhp
• Gearbox: Automatic (Steptronic)
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 194 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 56,298 miles on the clock, this 2020 BMW 8 Series M Sport has done roughly 15,800 more miles than a typical 2020 BMW 8 Series. The AskCar estimate for this car is £28,832. It is priced at £30,995, which is £2,163 above that estimate. The AskCar estimate uses 185 UK dealer adverts for the BMW 8 Series, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 16 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Berry Croydon BMW, based in Croydon. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £2,163 (7%) over the AskCar estimate of £28,832.

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 185 priced BMW 8 Series adverts across different ages and specifications, as of 6 November 2026.

A 2020 BMW 8 Series with the 3.0 petrol engine is typically advertised at £29,200: the median of the 37 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2020 BMW 8 Series has been on sale for at least 16 days.

Price history

AskCar first saw this advert on 21 October 2026 at £30,995. 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 6 November 2026: valid until 9 November 2026.

It has had 4 MOTs. The latest, on 5 November 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 46,527 miles, which matches the advertised 56,298 miles.

Advertised mileage is about 15,800 miles higher than the median mileage of a 2020 BMW 8 Series on AskCar.

Similar cars

3 other 2020 BMW 8 Series M Sport 3.0 petrol automatic convertibles are for sale at UK dealers, from £31,499 to £35,994, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW 8 Series M Sport, 3.0 petrol convertible, white. Mileage: 51,903 miles. Price: £31,499, £504 more than this car. Dealer: Lookers BMW Stafford in Stafford. AskCar page: https://askcar.co.uk/car/bmw-8-series-2020-63512853c8cb
• 2020 BMW 8 Series M Sport, 3.0 petrol convertible, black. Mileage: 33,395 miles. Price: £34,450, £3,455 more than this car. Dealer: MINI UK at Group 1 Lincoln in Lincoln. AskCar page: https://askcar.co.uk/car/bmw-8-series-2020-4d48d8426cca
• 2020 BMW 8 Series M Sport, 3.0 petrol convertible, black. Mileage: 22,377 miles. Price: £35,994, £4,999 more than this car. Dealer: Group 1 Reading BMW in Reading. AskCar page: https://askcar.co.uk/car/bmw-8-series-2020-5647ef374ae2