The BMW 8 Series G15 840i xDrive Steptronic, produced from July 2019 through 2020, 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 for the 7 Series, prioritized lightweight construction and advanced technology.
Technical Specifications
| Brand | BMW |
| Model | 8 Series |
| Generation | 8 Series (G15) |
| Type | 840i (340 Hp) xDrive Steptronic |
| Start of production | July, 2019 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 9.4-9.6 l/100 km (25 – 24.5 US mpg) |
| Fuel consumption (extra urban) | 6.3-6.5 l/100 km (37.3 – 36.2 US mpg) |
| Fuel consumption (combined) | 7.4-7.7 l/100 km (31.8 – 30.5 US mpg) |
| CO2 emissions | 169-174 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.7 sec |
| Acceleration 0 – 62 mph | 4.7 sec |
| Acceleration 0 – 60 mph | 4.5 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d – TEMP |
| Weight-to-power ratio | 5.2 kg/Hp |
| Weight-to-torque ratio | 3.5 kg/Nm |
| Power | 340 Hp @ 5000-6500 rpm |
| Torque | 500 Nm @ 1600-4500 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 |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1770 kg (3902.18 lbs.) |
| Max. weight | 2280 kg (5026.54 lbs.) |
| Max load | 510 kg (1124.36 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.) |
| Width including mirrors | 2137 mm (84.13 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, known for its smooth power delivery and efficiency. The B58 utilizes a single twin-scroll turbocharger, direct fuel injection, and Double-VANOS variable valve timing for both intake and exhaust. The engine produces 340 horsepower at 5,000-6,500 rpm and 500 Nm (368 lb-ft) of torque between 1,600 and 4,500 rpm. The engine’s block is constructed from aluminum, contributing to its relatively lightweight design. Paired with the engine is BMW’s 8-speed Steptronic automatic transmission. This transmission features a torque converter and offers both automatic and manual shift modes. The xDrive all-wheel-drive system is primarily rear-biased, sending power to all four wheels as needed to maximize traction.
Driving Characteristics
The 840i xDrive Steptronic delivers a refined and comfortable driving experience. The 3.0-liter inline-six provides ample power for both highway cruising and spirited driving. Acceleration from 0 to 60 mph takes approximately 4.5 seconds. The 8-speed automatic transmission shifts smoothly and responsively, and the xDrive system provides excellent grip in various weather conditions. Compared to the higher-performance M8, the 840i prioritizes comfort and ease of use over outright track performance. The gear ratios are tuned for a balance of acceleration and fuel efficiency. While not as engaging as a manual transmission, the Steptronic offers a Sport mode that holds gears longer and provides quicker shifts.
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 touchscreen infotainment system with iDrive controller, 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 included wood, carbon fiber, and aluminum accents.
Chassis & Braking
The G15 8 Series features 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 on all four wheels. The braking system includes ABS, dynamic stability control (DSC), and dynamic traction control (DTC). The standard wheel and tire size is 18-inch, but 19- and 20-inch wheels were available as options. The steering system is an electric power-assisted rack-and-pinion system.
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 noted as a significant benefit, particularly in regions with inclement weather. Compared to the 850i, the 840i offered a more accessible price point while still providing a high level of luxury and performance. Fuel economy was considered reasonable for a vehicle of its size and performance, averaging around 30-32 mpg on the highway. Reliability reports have been generally positive, with few major issues reported.
Legacy
The B58 engine has proven to be a robust and reliable powerplant, and the 840i xDrive Steptronic is expected to hold its value well over time. On the used car market, these models are sought after for their blend of luxury, performance, and all-weather capability. The G15 8 Series marked a successful return for BMW to the large luxury coupe segment, and the 840i xDrive Steptronic remains a desirable option for buyers seeking a refined and capable grand tourer.
