The BMW 740i, introduced as part of the G70 generation of the 7 Series in 2023, represents a significant step in the evolution of BMW’s flagship sedan. Positioned as a mid-range offering within the G70 lineup, it bridges the gap between the entry-level 735i and the high-performance M760i. This variant distinguishes itself through a combination of a 3.0-liter inline-six engine, mild hybrid technology, and BMW’s xDrive all-wheel-drive system paired with an 8-speed Steptronic automatic transmission. The 740i aims to deliver a balance of refined luxury, engaging performance, and improved fuel efficiency, catering to buyers seeking a sophisticated grand touring experience.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series (G70) |
| Type | 740i (375 Hp) Mild Hybrid xDrive Steptronic |
| Start of production | 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.8 l/100 km (24 US mpg) |
| Fuel consumption (extra urban) | 7.6 l/100 km (30.9 US mpg) |
| Fuel consumption (combined) | 8.7 l/100 km (27 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Weight-to-power ratio | 5.9 kg/Hp |
| Weight-to-torque ratio | 4.1 kg/Nm |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| System torque | 540 Nm (398.28 lb.-ft.) @ 1850-5000 rpm |
| Power | 375 Hp @ 5200-6250 rpm |
| Torque | 519 Nm (382.79 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B58B30M2 |
| 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 and Multi-port manifold injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | VALVETRONIC, Double-VANOS |
| Engine oil capacity | 6.75 l (7.13 US qt | 5.94 UK qt) |
| Kerb Weight | 2202 kg (4854.58 lbs.) |
| Max. weight | 2850 kg (6283.17 lbs.) |
| Max load | 648 kg (1428.6 lbs.) |
| Trunk (boot) space | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 74 l (19.55 US gal | 16.28 UK gal) |
| Length | 5391 mm (212.24 in.) |
| Width | 1950 mm (76.77 in.) |
| Width including mirrors | 2192 mm (86.3 in.) |
| Height | 1544 mm (60.79 in.) |
| Wheelbase | 3215 mm (126.57 in.) |
| Front track | 1661 mm (65.39 in.) |
| Rear track | 1648 mm (64.88 in.) |
| Front overhang | 983 mm (38.7 in.) |
| Rear overhang | 1194 mm (47.01 in.) |
| Ride height (ground clearance) | 147 mm (5.79 in.) |
| Minimum turning circle | 12.3 m (40.35 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) with MHEV |
| Number of gears | 8 |
| Gearbox type | Automatic transmission Steptronic |
| Front suspension | Double wishbone, Air suspension |
| Rear suspension | Independent multi-link suspension, Air suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Front tires | 255/45 R20 or 255/40 R21 |
| Rear tires | 285/40 R20 or 285/35 R21 |
INTRODUCTION
The G70 generation BMW 7 Series, launched in 2023, marked a significant departure in design and technology for the brand’s flagship model. The 740i, as a key variant, is powered by the B58B30M2 engine, a 3.0-liter turbocharged inline-six cylinder engine. This engine is augmented by a 48-volt mild hybrid system, contributing to improved efficiency and smoother operation. The 740i is exclusively offered with BMW’s xDrive all-wheel-drive system and an 8-speed Steptronic automatic transmission. It’s positioned as a sweet spot in the lineup, offering a compelling blend of performance, luxury, and technology without the higher price tag of the more powerful models.
Powertrain & Engine Architecture
At the heart of the 740i lies the B58B30M2 engine, a member of BMW’s modular engine family. This 3.0-liter inline-six engine utilizes a single twin-scroll turbocharger, direct fuel injection, and BMW’s VALVETRONIC variable valve timing and lift system. The addition of a 48V mild hybrid system incorporates a belt-driven starter-generator, enabling features like extended start-stop operation, coasting with engine shut-off, and a small power boost during acceleration. The engine produces 375 horsepower at 5,200-6,250 rpm and 382.79 lb-ft of torque. The 8-speed Steptronic automatic transmission is a sophisticated unit with adaptive shift programs and paddle shifters. It’s designed to provide smooth and efficient gear changes, optimizing both performance and fuel economy. The transmission is specifically tuned to work in harmony with the engine and the xDrive system.
Driving Characteristics
The 740i delivers a refined and composed driving experience. The mild hybrid system contributes to seamless acceleration and a noticeable reduction in engine noise during start-stop cycles. While not as overtly sporty as the M760i, the 740i offers ample power for confident highway cruising and spirited driving. The xDrive all-wheel-drive system provides excellent traction in various weather conditions. The 8-speed automatic transmission is generally responsive, although some drivers may prefer the more direct feel of the optional sport transmission programming. The air suspension provides a comfortable ride, effectively isolating passengers from road imperfections. The steering is precise and well-weighted, offering a good balance of feedback and assistance.
Equipment & Trim Levels
The 740i comes standard with a comprehensive suite of luxury features, including BMW’s iDrive 8 infotainment system with a large curved display, premium leather upholstery, heated and ventilated front seats, a panoramic sunroof, and a premium sound system. Standard safety features include automatic emergency braking, lane departure warning, and adaptive cruise control. Optional extras include a rear executive lounge package with individual rear seats, a Bowers & Wilkins Diamond Surround Sound System, and a variety of interior trim options. The 740i can be further customized with various exterior styling packages and wheel designs.
Chassis & Braking
The G70 7 Series utilizes a robust chassis construction with extensive use of aluminum and high-strength steel. The front suspension features a double-wishbone design with air suspension, while the rear suspension employs an independent multi-link setup, also with air suspension. This configuration provides a comfortable ride and precise handling. The 740i is equipped with ventilated disc brakes on all four wheels. The braking system is enhanced by ABS, dynamic stability control, and electronic brake-force distribution. The standard wheels are 20-inch alloy wheels, with 21-inch options available.
Market Reception & Comparison
The 740i has been generally well-received by automotive critics, praised for its refined driving experience, luxurious interior, and advanced technology. Compared to the 735i, the 740i offers a significant performance upgrade thanks to its larger engine and mild hybrid system. While the M760i delivers even more power, the 740i provides a more balanced and fuel-efficient option. Fuel economy figures are competitive for its class, with the EPA estimating 27 mpg combined. Reliability reports are still emerging for the G70 generation, but BMW’s inline-six engines have a generally good reputation for durability.
Legacy
The B58 engine family, including the B58B30M2 found in the 740i, has become known for its robust construction and relatively high reliability. The integration of mild hybrid technology in the G70 7 Series represents a step towards greater efficiency and reduced emissions. As the G70 generation ages, the 740i is expected to hold its value well, appealing to buyers seeking a luxurious and technologically advanced sedan with a proven powertrain. The combination of performance, comfort, and technology positions the 740i as a compelling choice in the luxury sedan segment for years to come.
