2021 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: 2021
• Mileage: 50,000 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

At 50,000 miles, this 2021 BMW 8 Series M Sport has covered about 4,900 more miles than other 2021 BMW 8 Series cars. Priced at £31,990, it is advertised £698 above the AskCar estimate of £31,292. The AskCar estimate uses UK dealer asking prices, including 185 BMW 8 Series adverts, and accounts for the car’s age, mileage and specification. It first appeared in our advert records today. Its advertised mileage matches the government's MOT record. You can find this car at LTV in Bury. 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: £698 (2%) over the AskCar estimate of £31,292.

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 2021 BMW 8 Series with the 3.0 petrol engine is typically advertised at £32,500: the median of the 23 for sale on AskCar, as of 6 November 2026.

Time on sale

AskCar first saw this 2021 BMW 8 Series advertised today.

Price history

AskCar first saw this advert on 6 November 2026 at £31,990. 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 2 August 2027.

It has had 4 MOTs. The latest, on 3 August 2026, passed.

Advisories at the latest test: offside front tyre slightly damaged.

Mileage at that test: 49,878 miles, which matches the advertised 50,000 miles.

Advertised mileage is about 4,900 miles higher than the median mileage of a 2021 BMW 8 Series on AskCar.

Similar cars

3 other 2021 BMW 8 Series M Sport 3.0 petrol automatic convertibles are for sale at UK dealers, from £33,495 to £41,014, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 8 Series M Sport, 3.0 petrol convertible, grey. Mileage: 42,000 miles. Price: £33,495, £1,505 more than this car. Dealer: Auto 2000 in Havering. AskCar page: https://askcar.co.uk/car/bmw-8-series-2021-a1c318686c60
• 2021 BMW 8 Series M Sport, 3.0 petrol convertible, black. Mileage: 32,433 miles. Price: £33,975, £1,985 more than this car. Dealer: PCBS Sales in Tonbridge. AskCar page: https://askcar.co.uk/car/bmw-8-series-2021-e587dbeecdb3
• 2021 BMW 8 Series M Sport, 3.0 petrol convertible, black. Mileage: 9,250 miles. Price: £41,014, £9,024 more than this car. Dealer: Vertu BMW Teesside in Teesside. AskCar page: https://askcar.co.uk/car/bmw-8-series-2021-afb8e27345aa