2021 BMW 8 Series 3.0 840i

Overview

• Make: BMW
• Model: 8 Series
• Version: 3.0 840i Steptronic RWD Euro 6 (s/s) 2dr
• Year: 2021
• Mileage: 63,027 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres
• Gearbox: Automatic (Steptronic)
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 194 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 63,027 miles, this 2021 BMW 8 Series has covered about 19,300 more miles than other 2021 BMW 8 Series cars. The dealer is asking £29,975, which is £2,087 above the AskCar estimate of £27,888. To work out the AskCar estimate, we analyse UK dealer adverts for 186 BMW 8 Series cars across different ages and specifications. We first recorded this advert 51 days ago, and its asking price has since fallen by £1,513. The government's MOT record matches its advertised mileage. It is advertised by Junction 17 Cars Peterborough in Yaxley. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Fair price: £2,087 (7%) over the AskCar estimate of £27,888.

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 8 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 8 November 2026.

Time on sale

This 2021 BMW 8 Series has been on sale for at least 51 days.

Price history

AskCar first saw this advert on 18 September 2026 at £31,488. Its asking price is now £29,975, £1,513 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 18 September 2026: £31,488
• 15 October 2026: £30,875
• 23 October 2026: £30,475
• 6 November 2026: £29,975

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 20 August 2027.

It failed its MOT on 19 August 2026 (nearside front tyre has a bulge, caused by separation or partial failure of its structure) and passed 1 day later, on 20 August 2026.

Advisories at the latest test: nearside rear tyre worn close to legal limit/worn on edge; offside rear tyre worn close to legal limit/worn on edge; offside rear tyre has a cut but not deep enough to reach the ply or cords.

Mileage at that test: 62,206 miles, which matches the advertised 63,027 miles.

Advertised mileage is about 19,300 miles higher than the median mileage of a 2021 BMW 8 Series on AskCar.