The BMW 730i, produced between 1992 and 1994, was a key variant within the E32 generation of the 7 Series. This facelifted model, introduced in 1992, represented a refinement of BMW’s flagship sedan, offering a balance of luxury, performance, and technology. Positioned as the entry point into the 7 Series range in many markets, the 730i provided a more accessible option compared to the higher-powered 740i and 750iL models. It served as a popular choice for buyers seeking the prestige of a 7 Series without the substantial price premium of its larger-engined siblings.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series (E32, facelift 1992) |
| Type (Engine) | 730i (188 Hp) cat Automatic |
| Start of production | 1992 |
| End of production | 1994 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 17.3 l/100 km (13.6 US mpg, 16.3 UK mpg, 5.8 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) | 11.7 l/100 km (20.1 US mpg, 24.1 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 10.6 sec |
| Acceleration 0 – 62 mph | 10.6 sec |
| Acceleration 0 – 60 mph | 10.1 sec |
| Maximum speed | 222 km/h (137.94 mph) |
| Weight-to-power ratio | 8.5 kg/Hp, 117.5 Hp/tonne |
| Weight-to-torque ratio | 6.2 kg/Nm, 162.5 Nm/tonne |
| Power | 188 Hp @ 5800 rpm |
| Power per litre | 63 Hp/l |
| Torque | 260 Nm @ 4000 rpm (191.77 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M30B30 |
| Engine displacement | 2986 cm3 (182.22 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 80 mm (3.15 in.) |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 5.75 l (6.08 US qt, 5.06 UK qt) |
| Coolant | 12 l (12.68 US qt, 10.56 UK qt) |
| Kerb Weight | 1600 kg (3527.4 lbs.) |
| Max. weight | 2120 kg (4673.8 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal, 19.8 UK gal) |
| Length | 4910 mm (193.31 in.) |
| Width | 1845 mm (72.64 in.) |
| Height | 1411 mm (55.55 in.) |
| Wheelbase | 2832 mm (111.5 in.) |
| Front track | 1527 mm (60.12 in.) |
| Rear (Back) track | 1550 mm (61.02 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle | 11.6 m (38.06 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 4 gears, automatic transmission |
| Front suspension | Coil spring |
| 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 | 205/65 VR 15 |
| Wheel rims size | 15 |
Powertrain & Engine Architecture
The 730i was powered by the M30B30, a 3.0-liter inline-six engine. This engine was a descendant of BMW’s long-running M30 family, known for its smoothness and durability. The B30 variant featured multi-port fuel injection, a relatively conservative 9:1 compression ratio, and a two-valve-per-cylinder configuration. The engine produced 188 horsepower at 5800 rpm and 260 Nm (191.77 lb-ft) of torque at 4000 rpm. The automatic transmission used was a 4-speed unit, designed to provide comfortable and refined shifts. This transmission was not known for its sportiness, prioritizing smoothness over rapid gear changes.
Driving Characteristics
The 730i Automatic offered a comfortable and relaxed driving experience. While not particularly quick – 0-60 mph took around 10.1 seconds – it provided sufficient power for everyday driving and highway cruising. The automatic transmission, while smooth, did detract from the overall performance feel compared to the 5-speed manual option available in some markets. The gear ratios were geared towards fuel efficiency and comfort, resulting in a less responsive feel during acceleration. Compared to the 740i with its larger 4.0-liter engine, the 730i felt noticeably less powerful, but it offered a more manageable and fuel-efficient driving experience.
Equipment & Trim Levels
The 730i came standard with a generous array of features, befitting its status as a luxury sedan. Standard equipment typically included leather upholstery, power-adjustable front seats, air conditioning, a sunroof, and an AM/FM stereo. Optional extras included a premium sound system, rear climate control, and upgraded leather trim. The interior design was characterized by BMW’s typically understated elegance, with a focus on functionality and driver comfort. The dashboard layout was clean and logical, with all essential controls within easy reach.
Chassis & Braking
The E32 7 Series featured a robust chassis with independent suspension at all four corners. The front suspension utilized coil springs and MacPherson struts, while the rear suspension employed coil springs and semi-trailing arms. The 730i typically came equipped with ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock braking system (ABS) was standard, enhancing safety and stability during braking. The steering was a power-assisted rack-and-pinion system, providing precise and responsive handling.
Market Reception & Comparison
The 730i was generally well-received by automotive critics as a capable and comfortable luxury sedan. It was praised for its smooth engine, refined ride, and generous standard equipment. However, some critics noted that the automatic transmission could feel sluggish, and the performance was not as exhilarating as that of the higher-powered 7 Series models. In terms of fuel economy, the 730i offered a noticeable improvement over the 740i and 750iL, making it a more practical choice for drivers who prioritized efficiency. Reliability was generally good, although maintenance costs could be high due to the complexity of the vehicle.
Legacy
The E32 730i remains a sought-after classic among BMW enthusiasts. The M30B30 engine is known for its durability and relatively straightforward maintenance. While finding parts can sometimes be challenging, the engine is generally considered to be reliable if properly maintained. Today, well-maintained examples of the 730i command respectable prices in the used car market, appealing to collectors and enthusiasts who appreciate the car’s blend of luxury, performance, and classic BMW styling. The 730i represents a significant chapter in BMW’s history, showcasing the brand’s commitment to engineering excellence and driving pleasure.
