The BMW 728i, produced between 1995 and 1998, was a key variant within the E38 generation of the BMW 7 Series. Positioned as the entry-level model in many markets, particularly in Europe, it offered a blend of luxury and performance at a more accessible price point than its larger-engined siblings. The E38 7 Series represented a significant leap forward for BMW in terms of technology, build quality, and overall refinement, establishing a new benchmark for full-size luxury sedans. The 728i specifically served as an appealing option for buyers prioritizing a smooth driving experience and reasonable running costs within the 7 Series range.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series (E38) |
| Type (Engine) | 728i (193 Hp) |
| Start of production | 1995 |
| End of production | 1998 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 14.5 l/100 km (16.2 US mpg, 19.5 UK mpg, 6.9 km/l) |
| Fuel consumption (economy) – extra urban | 7.8 l/100 km (30.2 US mpg, 36.2 UK mpg, 12.8 km/l) |
| Fuel consumption (economy) – combined | 10.3 l/100 km (22.8 US mpg, 27.4 UK mpg, 9.7 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.6 sec |
| Acceleration 0 – 62 mph | 8.6 sec |
| Acceleration 0 – 60 mph | 8.2 sec |
| Maximum speed | 227 km/h (141.05 mph) |
| Weight-to-power ratio | 8.7 kg/Hp, 115.6 Hp/tonne |
| Weight-to-torque ratio | 6 kg/Nm, 167.7 Nm/tonne |
| Power | 193 Hp @ 5300 rpm |
| Power per litre | 69.1 Hp/l |
| Torque | 280 Nm @ 3950 rpm (206.52 lb.-ft. @ 3950 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M52B28 |
| Engine displacement | 2793 cm3 (170.44 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 84 mm (3.31 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 | 5.75 l (6.08 US qt | 5.06 UK qt) |
| Coolant | 11 l (11.62 US qt | 9.68 UK qt) |
| Kerb Weight | 1670 kg (3681.72 lbs.) |
| Max. weight | 2205 kg (4861.19 lbs.) |
| Max load | 535 kg (1179.47 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 85 l (22.45 US gal | 18.7 UK gal) |
| Length | 4984 mm (196.22 in.) |
| Width | 1862 mm (73.31 in.) |
| Height | 1435 mm (56.5 in.) |
| Wheelbase | 2930 mm (115.35 in.) |
| Front track | 1552 mm (61.1 in.) |
| Rear (Back) track | 1568 mm (61.73 in.) |
| Drag coefficient (Cd) | 0.30 |
| 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 | 5 gears, manual transmission |
| Front suspension | Wishbone |
| Rear suspension | Inclined Lever |
| 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 | 215/65 R16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
The 728i was powered by the M52B28, a 2.8-liter inline-six engine. This engine was a cornerstone of BMW’s mid-1990s lineup, known for its smooth power delivery and inherent reliability. The M52 featured a cast iron block with an aluminum cylinder head, incorporating double overhead camshafts (DOHC) and four valves per cylinder. Fuel delivery was managed by a Bosch Motronic multi-port fuel injection system, optimizing combustion for both performance and efficiency. The engine produced 193 horsepower at 5300 rpm and 280 Nm (206.52 lb-ft) of torque at 3950 rpm. The 5-speed manual transmission was standard, providing a direct connection to the rear wheels. While an automatic transmission was available, it impacted acceleration slightly.
Driving Characteristics
The 728i offered a refined and comfortable driving experience. While not as overtly sporty as the higher-powered 740i, the 2.8-liter engine provided ample power for everyday driving and highway cruising. The manual transmission allowed for precise control, and the rear-wheel-drive configuration contributed to balanced handling. Acceleration from 0 to 60 mph took approximately 8.2 seconds, and the car had a top speed of 141 mph. Compared to the 740i, the 728i felt less urgent in its acceleration, but the difference was often negligible in real-world conditions. The 728i’s lighter weight, compared to its larger-engined counterparts, also contributed to a more nimble feel.
Equipment & Trim Levels
The 728i came standard with a comprehensive list of features expected of a luxury sedan in its class. This included leather upholstery, power-adjustable front seats with memory function, automatic climate control, a premium sound system, and power windows and locks. Optional extras included a sunroof, navigation system, upgraded leather trim, and rear seat entertainment. Trim levels were relatively simple, with most customization coming through individual options rather than distinct packages. The interior design emphasized understated elegance, with wood trim and a focus on driver ergonomics.
Chassis & Braking
The E38 7 Series featured a robust chassis with independent suspension at all four wheels. The front suspension utilized a double wishbone design, while the rear employed an inclined lever setup. This configuration provided a comfortable ride while maintaining good handling characteristics. The 728i was 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 control during emergency braking. The steering was a rack-and-pinion system with hydraulic power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The 728i was generally well-received by automotive critics. It was praised for its comfortable ride, refined interior, and fuel efficiency. However, some reviewers noted that the engine lacked the outright performance of the 740i. Compared to the 740i, the 728i offered a more affordable entry point into the 7 Series range, making it appealing to a wider range of buyers. Against competitors like the Mercedes-Benz S-Class and the Lexus LS400, the 728i was often seen as offering a more engaging driving experience. Fuel economy was a strong point, with combined figures around 22.8 US mpg, making it more economical than the larger-engined models.
Legacy
The E38 728i has developed a reputation for long-term reliability, particularly the M52B28 engine. With proper maintenance, these engines can reliably exceed 200,000 miles. Today, the E38 7 Series is a sought-after classic, and the 728i represents a particularly attractive option for those seeking a well-built, comfortable, and relatively affordable luxury sedan. Parts availability remains good, and a strong enthusiast community provides support and resources for owners. While not the fastest or most prestigious variant of the E38, the 728i offers a compelling combination of luxury, performance, and reliability that continues to appeal to enthusiasts and collectors alike.
