The BMW 730i, part of the E65 generation of the 7 Series produced between 2004 and 2005, represented an entry point into BMW’s flagship luxury sedan range. Positioned below the 745i and 760i, the 730i offered a balance of performance and efficiency, appealing to buyers who desired the prestige of a 7 Series without the higher price tag and increased running costs of its more powerful siblings. This variant was primarily aimed at the European and Asian markets, where smaller displacement engines were favored due to tax regulations and fuel costs, though it was also available in limited numbers in North America.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series (E65) |
| Type (Engine) | 730i (231 Hp) Steptronic |
| Start of production | 2004 |
| End of production | 2005 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 15.5 l/100 km (15.2 US mpg, 18.2 UK mpg, 6.5 km/l) |
| Fuel consumption (extra urban) | 7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 km/l) |
| Fuel consumption (combined) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.1 sec |
| Acceleration 0 – 62 mph | 8.1 sec |
| Acceleration 0 – 60 mph | 7.7 sec |
| Maximum speed | 237 km/h (147.26 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 7.4 kg/Hp, 134.7 Hp/tonne |
| Weight-to-torque ratio | 5.7 kg/Nm, 174.9 Nm/tonne |
| Power | 231 Hp @ 5900 rpm |
| Power per litre | 77.5 Hp/l |
| Torque | 300 Nm @ 3500 rpm (221.27 lb.-ft. @ 3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M54B30 |
| Engine displacement | 2979 cm3 (181.79 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 89.6 mm (3.53 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 11.4 l (12.05 US qt | 10.03 UK qt) |
| Kerb Weight | 1715 kg (3780.93 lbs.) |
| Max. weight | 2370 kg (5224.96 lbs.) |
| Max load | 655 kg (1444.03 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 | 5029 mm (197.99 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1492 mm (58.74 in.) |
| Wheelbase | 2990 mm (117.72 in.) |
| Front track | 1578 mm (62.13 in.) |
| Rear (Back) track | 1582 mm (62.28 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| 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 | 225/60 R17 |
| Wheel rims size | 8J x 17 |
Powertrain & Engine Architecture
The 730i was powered by the M54B30, a 3.0-liter inline-six engine. This engine was a mainstay of BMW’s lineup during the early 2000s, known for its smooth power delivery and relative reliability. The M54 featured double overhead camshafts (DOHC), four valves per cylinder, and a multi-port fuel injection system. The engine produced 231 horsepower at 5900 rpm and 300 Nm (221 lb-ft) of torque at 3500 rpm. The ‘B’ designation in the engine code signifies that it was built with cast iron cylinder liners, enhancing durability. Paired with the engine was a 6-speed Steptronic automatic transmission, BMW’s branded automatic gearbox offering both fully automatic operation and manual shift capability via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The 730i’s driving experience was characterized by a comfortable ride and adequate, though not overwhelming, performance. The automatic transmission, while smooth, wasn’t as quick to respond as some competitors. Acceleration from 0 to 60 mph took around 7.7 seconds, making it slower than the 745i and 760i. The gear ratios were tuned for fuel efficiency and relaxed cruising rather than outright speed. Compared to the manual transmission options available on other 7 Series models, the automatic 730i felt less engaging, but it provided a more effortless driving experience, particularly in urban traffic. The inline-six engine delivered a linear power curve, making it predictable and easy to modulate.
Equipment & Trim Levels
The 730i came standard with a comprehensive list of features befitting a luxury sedan. This included leather upholstery, power-adjustable front seats with memory function, automatic climate control, a premium sound system, and a sunroof. Optional extras included features like active suspension, upgraded leather trim, rear seat entertainment, and a navigation system. The interior design was typical of BMW at the time, emphasizing a driver-focused layout with high-quality materials and a clean, functional aesthetic. Trim levels were relatively limited, with most customization occurring through the selection of individual options.
Chassis & Braking
The E65 7 Series featured a robust chassis with a MacPherson strut front suspension and a multi-link rear suspension. The 730i, being the entry-level model, typically came equipped with ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock brakes (ABS) were standard. The suspension was tuned for comfort, providing a smooth and controlled ride. The steering was hydraulic power-assisted, offering precise and responsive handling. The 730i’s weight of approximately 1715 kg (3781 lbs) was relatively moderate for a full-size luxury sedan, contributing to its manageable handling characteristics.
Market Reception & Comparison
The 730i was generally well-received by automotive critics, who praised its comfortable ride, refined interior, and fuel efficiency. However, some reviewers noted that its performance was not as exhilarating as that of the higher-powered 7 Series models. Compared to the 745i, which featured a V8 engine, the 730i offered significantly less power and acceleration. However, it also offered better fuel economy and a lower purchase price. Against competitors like the Mercedes-Benz S-Class and Audi A8, the 730i held its own in terms of luxury and technology, but its performance was often considered to be slightly behind.
Legacy
The M54B30 engine, found in the 730i, has proven to be a relatively reliable powertrain when properly maintained. Common issues include oil leaks, cooling system failures, and occasional problems with the VANOS variable valve timing system. The Steptronic automatic transmission is also generally durable, but can require servicing to maintain smooth operation. Today, the E65 730i represents an affordable entry point into BMW’s flagship luxury sedan lineage. While it may not offer the same level of performance or prestige as its more powerful siblings, it provides a comfortable and well-equipped driving experience at a reasonable price point. Its relative simplicity compared to later 7 Series generations makes it a potentially attractive option for enthusiasts seeking a classic BMW experience.
