The BMW 740Li, part of the E66 long-wheelbase 7 Series generation produced from 2005 to 2008, represented a significant offering in the luxury sedan market. Positioned as a mid-range variant within the 7 Series lineup, it bridged the gap between the entry-level 730Li and the flagship 760Li. The “Li” designation signified the extended wheelbase, providing increased rear passenger legroom – a particularly important feature in markets like China, where the car saw substantial sales. This facelifted version of the E66 addressed some criticisms leveled at the original 2001 launch, refining the iDrive system and exterior styling. The 740Li aimed to deliver a balance of performance, luxury, and technology, appealing to buyers who desired a powerful and well-equipped sedan without the outright expense of the V12-powered model.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series Long (E66, facelift 2005) |
| Type (Engine) | 740Li (306 Hp) Steptronic |
| Start of production | 2005 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 16.3 l/100 km (14.4 US mpg, 17.3 UK mpg, 6.1 km/l) |
| Fuel consumption (economy) – extra urban | 8.2 l/100 km (28.7 US mpg, 34.4 UK mpg, 12.2 km/l) |
| Fuel consumption (economy) – combined | 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.9 sec |
| Acceleration 0 – 62 mph | 6.9 sec |
| Acceleration 0 – 60 mph | 6.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 6.3 kg/Hp, 158.1 Hp/tonne |
| Weight-to-torque ratio | 5 kg/Nm, 201.6 Nm/tonne |
| Power | 306 Hp @ 6300 rpm |
| Power per litre | 76.5 Hp/l |
| Torque | 390 Nm @ 3500 rpm (287.65 lb.-ft. @ 3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N62B40A |
| Engine displacement | 4000 cm3 (244.09 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 87 mm (3.43 in.) |
| Piston Stroke | 84.1 mm (3.31 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1935 kg (4265.94 lbs.) |
| Max. weight | 2515 kg (5544.63 lbs.) |
| Max load | 580 kg (1278.68 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 88 l (23.25 US gal | 19.36 UK gal) |
| Length | 5179 mm (203.9 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1484 mm (58.43 in.) |
| Wheelbase | 3130 mm (123.23 in.) |
| Front track | 1578 mm (62.13 in.) |
| Rear (Back) track | 1596 mm (62.83 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 12.6 m (41.34 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Steptronic |
| Front suspension | Spring Strut |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 245/55 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
The heart of the 740Li was the N62B40A 4.0-liter naturally aspirated V8 engine. This engine, a member of BMW’s N62 family, featured all-aluminum construction, double VANOS (variable valve timing) for both intake and exhaust camshafts, and a Siemens MSV80 engine control unit. The multi-port fuel injection system delivered fuel directly into the intake ports, optimizing combustion efficiency. The engine produced 306 horsepower at 6300 rpm and 390 Nm (287.65 lb-ft) of torque at 3500 rpm. The engine’s design prioritized smooth power delivery and refinement over outright peak performance. Paired with the engine was a six-speed Steptronic automatic transmission. This transmission offered both fully automatic operation and a manual shift mode, allowing drivers to exert more control over gear selection. The Steptronic system was known for its smooth and responsive shifts, contributing to the overall luxurious driving experience.
Driving Characteristics
The 740Li offered a compelling blend of performance and comfort. While not as overtly sporty as some of its rivals, the 4.0-liter V8 provided ample power for effortless cruising and confident overtaking. Acceleration from 0 to 60 mph took approximately 6.6 seconds, and the car was electronically limited to a top speed of 155 mph. The automatic transmission’s gear ratios were tuned for relaxed highway driving, with a focus on minimizing engine revs at cruising speeds. Compared to the 730Li (with its inline-six engine), the 740Li offered significantly more power and torque, resulting in a more responsive and refined driving experience. However, it lacked the raw acceleration of the 760Li, which boasted a powerful V12 engine. The long wheelbase contributed to a smooth and stable ride, absorbing bumps and imperfections in the road with ease.
Equipment & Trim Levels
The 740Li came standard with a comprehensive array of luxury features. These included leather upholstery, power-adjustable front seats with memory function, a premium sound system, automatic climate control, and a power sunroof. The iDrive infotainment system, though initially criticized for its complexity, offered control over various vehicle functions, including navigation, audio, and climate control. Optional extras included rear-seat entertainment systems, active suspension, massaging seats, and a variety of interior trim options. The extended wheelbase provided generous rear passenger space, making the 740Li a popular choice for chauffeur-driven executives and families.
Chassis & Braking
The E66 7 Series featured a robust chassis with a MacPherson strut front suspension and a multi-link rear suspension. The suspension was tuned for comfort, prioritizing a smooth and controlled ride. The 740Li was equipped with ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock braking system (ABS) was standard, enhancing braking performance and stability. The hydraulic power steering provided precise and responsive steering feel. The car rode on 17-inch alloy wheels, fitted with 245/55 R17 tires.
Market Reception & Comparison
The 740Li was generally well-received by automotive critics, who praised its powerful engine, luxurious interior, and comfortable ride. However, some reviewers noted that the iDrive system could be distracting and difficult to use. Compared to its competitors, such as the Mercedes-Benz S-Class and the Audi A8, the 740Li offered a more driver-focused experience, with sharper handling and a more engaging engine. Fuel economy was reasonable for a large luxury sedan, but not exceptional. Reliability was a mixed bag, with some owners reporting issues with the cooling system and electronic components.
Legacy
The E66 740Li, while not without its flaws, remains a desirable luxury sedan in the used car market. The N62 V8 engine, while known for some potential maintenance issues (such as coolant leaks and oil consumption), is generally considered durable when properly maintained. The car’s spacious interior, comfortable ride, and powerful engine continue to appeal to buyers seeking a luxurious and refined driving experience. The E66 generation, including the 740Li, represents a pivotal moment in BMW’s history, showcasing the brand’s commitment to innovation and luxury. Today, well-maintained examples are sought after by enthusiasts and collectors.
