The BMW M850i xDrive Convertible (G14 LCI), introduced in March 2022, represents the facelifted version of the first-generation G14 8 Series Convertible. Positioned as the performance flagship of the 8 Series range, the M850i combines luxurious open-top motoring with potent power derived from BMW’s twin-turbocharged V8 engine. The “LCI” (Life Cycle Impulse) designation signifies a mid-cycle refresh, bringing updated styling, technology, and refinements to the already sophisticated platform. This variant caters to buyers seeking a high-performance grand tourer with the added enjoyment of a convertible experience.
Technical Specifications
| Brand | BMW |
| Model | 8 Series |
| Generation | 8 Series Convertible (G14 LCI, facelift 2022) |
| Type | M850i (530 Hp) xDrive Steptronic Sport |
| Start of production | March, 2022 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Combined fuel consumption (WLTP) | 10.7-11 l/100 km (22 – 21.4 US mpg, 26.4 – 25.7 UK mpg, 9.3 – 9.1 km/l) |
| CO2 emissions (WLTP) | 243-249 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.1 sec |
| Acceleration 0 – 62 mph | 4.1 sec |
| Acceleration 0 – 60 mph | 3.9 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 3.9 kg/Hp, 258.5 Hp/tonne |
| Weight-to-torque ratio | 2.7 kg/Nm, 365.9 Nm/tonne |
| Power | 530 Hp @ 5500-6000 rpm |
| Power per litre | 120.6 Hp/l |
| Torque | 750 Nm @ 1800-4600 rpm (553.17 lb.-ft. @ 1800-4600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N63B44D |
| Engine displacement | 4395 cm3 (268.2 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 88.3 mm (3.48 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Engine oil capacity | 10.5 l (11.1 US qt | 9.24 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 2050 kg (4519.48 lbs.) |
| Max. weight | 2515 kg (5544.63 lbs.) |
| Max load | 465 kg (1025.15 lbs.) |
| Trunk (boot) space – minimum | 280-350 l (9.89 – 12.36 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 UK gal) |
| Length | 4851 mm (190.98 in.) |
| Width | 1902 mm (74.88 in.) |
| Width including mirrors | 2137 mm (84.13 in.) |
| Height | 1345 mm (52.95 in.) |
| Wheelbase | 2822 mm (111.1 in.) |
| Front track | 1627 mm (64.06 in.) |
| Rear (Back) track | 1642 mm (64.65 in.) |
| Front overhang | 953 mm (37.52 in.) |
| Rear overhang | 1076 mm (42.36 in.) |
| Minimum turning circle | 11.9 m (39.04 ft.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives all four wheels. |
| Number of gears | 8 |
| Gearbox type | Automatic transmission Steptronic Sport |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/35 R20; 275/30 R20 |
| Wheel rims size | 8J x 20; 9J x 20 |
Powertrain & Engine Architecture
At the heart of the M850i xDrive Convertible lies BMW’s N63B44D 4.4-liter twin-turbocharged V8 engine. This engine is a highly refined iteration of the N63 family, featuring a hot-wire mass airflow system, direct fuel injection, and variable valve timing (Valvetronic) and variable valve lift (Double-VANOS). The twin-scroll turbochargers are positioned within the V of the engine, minimizing turbo lag and maximizing responsiveness. The engine produces 530 horsepower at 5,500-6,000 rpm and a substantial 750 Nm (553 lb-ft) of torque between 1,800 and 4,600 rpm. This broad torque curve contributes to effortless acceleration in all gears.
The engine is paired with BMW’s 8-speed Steptronic Sport automatic transmission. This transmission offers smooth and rapid gear changes, and includes paddle shifters for manual control. The xDrive all-wheel-drive system intelligently distributes power between the front and rear axles, optimizing traction and stability in various driving conditions. The system is rear-biased under normal circumstances, providing a sporty driving feel, but can shift power forward when needed for enhanced grip.
Driving Characteristics
The M850i xDrive Convertible delivers a compelling blend of performance and comfort. The powerful V8 engine provides exhilarating acceleration, with a 0-60 mph time of around 3.9 seconds. The automatic transmission is well-tuned, offering seamless shifts and contributing to a relaxed cruising experience. The xDrive system provides confident handling and stability, even in challenging weather conditions. While not as overtly track-focused as the M8 Competition, the M850i offers more than enough performance for spirited driving on public roads. The convertible top operation is relatively quick and quiet, allowing for open-air enjoyment without excessive wind noise.
Equipment & Trim Levels
The M850i xDrive Convertible comes standard with a comprehensive array of luxury and technology features. Standard equipment includes leather upholstery, heated and ventilated front seats, a premium sound system, a large infotainment display with iDrive controller, and a suite of advanced driver-assistance systems. Optional extras include upgraded leather options, carbon fiber trim, a head-up display, and parking assistance features. The LCI update brought revised interior trim options and updated infotainment software.
Chassis & Braking
The M850i xDrive Convertible features a sophisticated chassis designed to balance comfort and handling. The front suspension utilizes a double-wishbone design, while the rear suspension employs an independent multi-link setup. Adaptive dampers are standard, allowing the driver to adjust the suspension firmness to suit their preferences. The braking system consists of ventilated discs at all four corners, providing ample stopping power. The electronic stability control system (DSC) and traction control system (DTC) work in conjunction to enhance safety and stability.
Market Reception & Comparison
The M850i xDrive Convertible was generally well-received by automotive critics. Reviewers praised its powerful engine, luxurious interior, and refined driving experience. Compared to the higher-performance M8 Competition, the M850i offered a more comfortable and compliant ride, making it a better choice for long-distance cruising. Fuel economy, while not a priority for this type of vehicle, was considered reasonable for its performance level. Reliability reports have been generally positive, although the complexity of the engine and drivetrain requires diligent maintenance.
Legacy
The BMW M850i xDrive Convertible (G14 LCI) represents a compelling offering in the high-performance luxury convertible segment. The N63B44D engine is known for its robust construction and potential for longevity, provided it receives regular maintenance. On the used car market, these models hold their value relatively well, appealing to buyers seeking a blend of performance, luxury, and open-air driving enjoyment. The G14 LCI’s refinements over the original G14 further enhance its appeal, solidifying its position as a desirable grand tourer.
