The BMW 8 Series G15 840i xDrive Steptronic, produced from 2020 to March 2022, represents BMW’s re-entry into the large luxury coupe market after a nearly two-decade hiatus. Positioned as a mid-range offering within the G15 8 Series lineup, it slots between the base 840i and the high-performance M8. This variant aimed to deliver a blend of grand touring comfort, respectable performance, and all-weather capability through BMW’s xDrive all-wheel-drive system. The G15 generation, built on an extended version of the CLAR platform also used by the 7 Series, prioritized lightweight construction and advanced technology.
Technical Specifications
| Brand | BMW |
| Model | 8 Series |
| Generation | 8 Series (G15) |
| Type | 840i (333 Hp) xDrive Steptronic |
| Start of production | 2020 |
| End of production | March, 2022 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 9.5-9.9 l/100 km (24.8 – 23.8 US mpg) |
| Fuel consumption (extra urban) | 6.5-6.6 l/100 km (36.2 – 35.6 US mpg) |
| Fuel consumption (combined) | 7.6-7.8 l/100 km (30.9 – 30.2 US mpg) |
| CO2 emissions | 174-180 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.9 sec |
| Acceleration 0 – 62 mph | 4.9 sec |
| Acceleration 0 – 60 mph | 4.7 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 5.4 kg/Hp |
| Weight-to-torque ratio | 3.6 kg/Nm |
| Power | 333 Hp @ 5500-6250 rpm |
| Torque | 500 Nm @ 1700-4000 rpm (368.78 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30C |
| Engine displacement | 2998 cm3 (182.95 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | VALVETRONIC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1795 kg (3957.3 lbs.) |
| Max. weight | 2280 kg (5026.54 lbs.) |
| Max load | 485 kg (1069.24 lbs.) |
| Trunk (boot) space | 420 l (14.83 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 UK gal) |
| Length | 4843 mm (190.67 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1341 mm (52.8 in.) |
| Wheelbase | 2822 mm (111.1 in.) |
| Front track | 1627 mm (64.06 in.) |
| Rear track | 1642 mm (64.65 in.) |
| Ride height | 121 mm (4.76 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle | 11.9 m (39.04 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 8 |
| Gearbox type | Automatic transmission Steptronic |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
The 840i xDrive Steptronic is powered by BMW’s B58B30C 3.0-liter inline-six engine. This engine is a member of BMW’s modular engine family and features a single twin-scroll turbocharger, direct fuel injection, and BMW’s VALVETRONIC variable valve timing and lift system. The B58 engine is known for its smooth power delivery and responsiveness. The engine produces 333 horsepower at 5500-6250 rpm and 368 lb-ft of torque between 1700 and 4000 rpm. This power is then sent to all four wheels via BMW’s xDrive all-wheel-drive system and an 8-speed Steptronic automatic transmission. The Steptronic transmission offers both automatic shifting and manual control via steering wheel-mounted paddles. The transmission is tuned for smooth shifts and efficient operation, prioritizing comfort over outright performance.
Driving Characteristics
The 840i xDrive Steptronic delivers a refined and comfortable driving experience. The combination of the smooth inline-six engine and the 8-speed automatic transmission provides effortless acceleration. While not as overtly sporty as the M8, the 840i still offers brisk performance, achieving 0-60 mph in approximately 4.7 seconds. The xDrive all-wheel-drive system provides excellent traction in all weather conditions, enhancing stability and confidence. Compared to a manual transmission-equipped 840i (not widely available in the US market), the Steptronic automatic prioritizes ease of use and comfort, sacrificing some driver engagement. The gear ratios are optimized for both acceleration and fuel efficiency, with a relatively tall final drive contributing to improved highway cruising.
Equipment & Trim Levels
The 840i xDrive Steptronic came standard with a comprehensive list of features, including leather upholstery, power-adjustable seats with memory function, a 12.3-inch digital instrument cluster, a 10.25-inch central infotainment display with iDrive 7.0 operating system, navigation, Apple CarPlay compatibility, and a premium sound system. Optional extras included upgraded leather options, a Bowers & Wilkins Diamond Surround Sound System, active roll stabilization, laser headlights, and various driver-assistance systems such as adaptive cruise control and lane keeping assist. Interior trim options ranged from fine wood veneers to carbon fiber accents, allowing buyers to personalize the cabin to their preferences.
Chassis & Braking
The 8 Series G15 utilizes a sophisticated chassis design featuring a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a comfortable ride while maintaining precise handling. The 840i xDrive Steptronic is equipped with ventilated disc brakes at all four corners. The braking system is enhanced by ABS, dynamic stability control (DSC), and dynamic traction control (DTC). The standard suspension setup is tuned for grand touring comfort, but an optional adaptive suspension system with adjustable dampers was available, allowing drivers to tailor the ride to their preferences.
Market Reception & Comparison
The 840i xDrive Steptronic was generally well-received by automotive critics. Reviewers praised its luxurious interior, comfortable ride, and strong performance. The xDrive all-wheel-drive system was also highlighted as a significant benefit, particularly in regions with inclement weather. Compared to the 840i with rear-wheel drive, the xDrive version offered increased stability and traction. Against competitors such as the Mercedes-Benz S-Class Coupe and the Lexus LC 500, the 840i was often seen as a more driver-focused option, offering a sportier driving experience. Fuel economy was respectable for a vehicle of its size and performance, averaging around 30 mpg combined.
Legacy
The B58 engine powering the 840i xDrive Steptronic has proven to be a reliable and durable powerplant. While some early B58 engines experienced issues with oil consumption, these were largely addressed with updated engine management software. The 8-speed Steptronic automatic transmission is also known for its reliability. On the used car market, the G15 840i xDrive Steptronic holds its value well, appealing to buyers seeking a luxurious and capable grand tourer. Its blend of performance, comfort, and technology ensures its continued desirability for years to come.
