BMW 8 Series Mk1 Buyer’s Guide: What To Know In 2025

The BMW 8 Series Mk1, launched in 2018, blends grand touring luxury with sports car dynamics, making it an appealing choice on the used market. Available as a coupe, convertible, or four-door Gran Coupe, this model offers powerful engines and advanced tech, ideal for long-distance drives and spirited performance.

Model History and Variants Overview

Production of the first-generation 8 Series began in late 2018 with the two-door coupe, introducing diesel and petrol powertrains. The lineup expanded in 2019 to include the open-top convertible and the practical Gran Coupe body style. Key variants feature a range of engines from efficient six-cylinders to high-output V8s, catering to different buyer preferences for power and economy.

Initial offerings included the 840d diesel coupe with a 3.0-liter six-cylinder producing 315 horsepower, paired with the high-performance M850i boasting a 4.4-liter twin-turbo V8 delivering 522 horsepower. The convertible mirrored these options, while the Gran Coupe added a 3.0-liter petrol 840i with 335 horsepower. In late 2019, the flagship M8 Competition joined with 616 horsepower from its enhanced V8.

Engine Options and Performance Breakdown

Buyers have several powertrain choices, each balancing performance and efficiency differently. The diesel 840d provides strong low-end torque ideal for motorway cruising, achieving 0-62mph in around 5 seconds. Petrol six-cylinder 840i offers smoother revving for everyday use, while V8 models like the M850i and M8 Competition excel in outright acceleration, hitting 0-62mph in under 4 seconds.

Most models come with xDrive all-wheel drive for superior traction, except the rear-wheel-drive 840i. An eight-speed automatic transmission is standard, delivering seamless shifts across all variants.

Design and Body Styles Compared

The 8 Series lineup spans three body configurations, each with distinct appeal. The coupe measures nearly five meters long, offering sleek lines and a low stance that emphasizes its sporting intent. Its 420-liter boot provides ample space for luggage, suitable for weekend getaways.

The convertible trades some practicality for open-air thrills, with a power-folding fabric roof that operates at speeds up to 31mph. Boot space drops to 350 liters with the roof up, but it remains usable for daily duties. The Gran Coupe, with four doors, enhances versatility for families or executives, boasting 440 liters of cargo room and easier rear access.

• Coupe: Sportiest profile, largest boot among two-doors.
• Convertible: Ultimate freedom, slightly compromised storage.
• Gran Coupe: Practical four-doors, generous trunk.

Interior Quality and Standard Equipment

Inside, the 8 Series impresses with premium materials like Merino leather upholstery and ambient lighting that spans multiple colors. Standard features across trims include 20-inch alloy wheels, a head-up display, adaptive cruise control, Apple CarPlay, navigation, heated seats, and adaptive LED headlights with parking aids.

The cabin layout prioritizes driver focus, with a digital instrument cluster and curved touchscreen for infotainment. Rear seats accommodate adults reasonably in the Gran Coupe, though headroom in the coupe and convertible is tighter due to the roofline. Build quality feels robust, contributing to its luxury grand tourer credentials.

Driving Experience and Handling Traits

Despite its size, the 8 Series handles with poise, thanks to adaptive suspension and precise steering. Driving modes allow customization of throttle, damping, and steering feel, from comfort-oriented for highways to sport settings for twisty roads. The xDrive system enhances stability without dulling engagement.

It’s at its best on sweeping A-roads and motorways, where the smooth automatic and refined engines shine. Six-cylinder models ride on run-flat tires for puncture resilience, while V8s use conventional rubber with sealant kits. Fuel economy varies: diesels achieve around 40mpg on long runs, petrols less so.

Reliability Insights and Known Issues

With relatively low production numbers, the 8 Series lacks widespread fault data from owner reports. Early models benefit from BMW’s three-year unlimited-mileage warranty. Connected services like navigation updates are free for the first three years only.

Potential checks include tire types—ensure run-flats on six-cylinders match specs. V8 models incur higher running costs due to premium fuel and maintenance. No major recurring problems noted, but inspect for general wear on a complex luxury car.

Ownership Costs and Maintenance Essentials

BMW’s Condition Based Servicing intervals reach up to two years or 16,000 miles, replacing only necessary parts. Basic oil changes cost about £410, while comprehensive services with filters and plugs run £735. Brake fluid renewal every two years is £147; no cambelt worries as engines use chains.

V8 ownership demands deeper pockets: expect higher insurance, fuel (around 25mpg combined), and tire costs. Used prices start from £50,000 for higher-mileage examples, dipping lower for six-cylinders. Depreciation stabilizes for well-maintained cars.

Purchasing Tips: What to Inspect

When viewing a used 8 Series, prioritize full service history and verified mileage. Check bodywork for parking dings on wide panels, a common issue on large coupes. Test all electronics, including the roof on convertibles and seats for smooth adjustment.

• Verify tire condition and type match the model.
• Inspect boot seals and carpets for water ingress.
• Test driving modes and xDrive engagement.
• Scan for accident repairs via paint thickness gauge.
• Confirm warranty remnants or extended coverage.

Market Values and Best Buys

Early 840d coupes offer value entry around £40,000-£60,000 with 50,000 miles. M850i examples command £70,000+, while M8s exceed £100,000 for low-mileage units. Gran Coupes hold appeal for practicality seekers. Aim for 2020+ models with remaining warranty.

Six-cylinder diesels provide the best balance of performance and costs, avoiding V8 premiums unless ultimate power is essential.

Frequently Asked Questions

Is the BMW 8 Series reliable?

Yes, with no major fault patterns reported; regular servicing key for longevity.

What’s the difference between M850i and M8?

M8 offers more power (616bhp vs 522bhp) and track-focused tuning.

Are parts expensive for the 8 Series?

Typical for BMW luxury models; V8s costlier than six-cylinders.

Best model for daily driving?

840d Gran Coupe for efficiency and space.

How fuel-efficient is it?

Diesels up to 40mpg; petrols 25-30mpg combined.