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: 42,904 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 3.0 litres, 328 bhp
• Gearbox: Automatic (Steptronic)
• Drive: Rear-wheel drive
• Colour: Black
• CO2: 189 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2021 BMW 8 Series M Sport is 42,904 miles. Its asking price of £31,499 is £952 below the AskCar estimate of £32,451. The AskCar estimate draws on 186 BMW 8 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 19 days ago. We checked its advertised mileage against the government's MOT record, and they match. The seller is Williams Bolton Bmw, based in Bolton. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £952 (2%) under the AskCar estimate of £32,451.

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 186 priced BMW 8 Series adverts across different ages and specifications, as of 5 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 5 November 2026.

Time on sale

This 2021 BMW 8 Series has been on sale for at least 19 days.

Price history

AskCar first saw this advert on 17 October 2026 at £31,499. 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 5 November 2026: valid until 8 July 2027.

It has had 3 MOTs. The latest, on 11 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 39,443 miles, which matches the advertised 42,904 miles.

Advertised mileage is about 800 miles lower than the median mileage of a 2021 BMW 8 Series on AskCar.

Similar cars

10 other 2021 BMW 8 Series M Sport 3.0 petrol automatic coupes are for sale at UK dealers, from £23,695 to £35,995, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 8 Series M Sport, 3.0 petrol coupe, blue. Mileage: 44,578 miles. Price: £31,000, £499 less than this car. Dealer: Sytner Coventry BMW in Coventry. AskCar page: https://askcar.co.uk/car/bmw-8-series-2021-b86cc63e4b98
• 2021 BMW 8 Series M Sport, 3.0 petrol coupe, black. Mileage: 45,575 miles. Price: £30,990, £509 less than this car. Dealer: Main Road Motor Company in Worcester. AskCar page: https://askcar.co.uk/car/bmw-8-series-2021-0d26fd4eb139
• 2021 BMW 8 Series M Sport, 3.0 petrol coupe, grey. Mileage: 39,000 miles. Price: £30,990, £509 less than this car. Dealer: LTV in Manchester. AskCar page: https://askcar.co.uk/car/bmw-8-series-2021-e8c3ca17bf92