The BMW 5 Series E28 528i Automatic, produced between 1981 and 1987, represented a significant step forward for BMW’s mid-size executive car. Positioned as a premium offering within the E28 range, the 528i combined a potent inline-six engine with the convenience of a three-speed automatic transmission. This variant aimed to deliver a blend of performance and comfort, appealing to buyers who desired a refined driving experience without the need for manual gear changes. It was a key model in establishing the 5 Series’ reputation for sporting dynamics and build quality, particularly in the North American market where automatics were highly favored.
Technical Specifications
| Brand | BMW |
| Model | 5 Series |
| Generation | 5 Series (E28) |
| Type (Engine) | 528i (184 Hp) Automatic |
| Start of production | 1981 |
| End of production | 1987 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Power | 184 Hp @ 5800 rpm |
| Power per litre | 66 Hp/l |
| Torque | 235 Nm @ 4300 rpm / 173.33 lb.-ft. @ 4300 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M30B28 |
| Engine displacement | 2788 cm3 / 170.13 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 |
| Engine oil capacity | 4.3 l / 4.54 US qt | 3.78 UK qt |
| Coolant | 10.5 l / 11.1 US qt | 9.24 UK qt |
| Trunk (boot) space – minimum | 460 l / 16.24 cu. ft. |
| Fuel tank capacity | 70 l / 18.49 US gal | 15.4 UK gal |
| Length | 4620 mm / 181.89 in. |
| Width | 1700 mm / 66.93 in. |
| Height | 1415 mm / 55.71 in. |
| Wheelbase | 2625 mm / 103.35 in. |
| Front track | 1430 mm / 56.3 in. |
| Rear (Back) track | 1470 mm / 57.87 in. |
| Ride height (ground clearance) | 140 mm / 5.51 in. |
| 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 | 3 gears, automatic transmission |
| Front brakes | Disc |
| Rear brakes | Disc |
Powertrain & Engine Architecture
The heart of the 528i Automatic is the M30B28 engine, a 2.8-liter inline-six cylinder powerplant. This engine is a descendant of BMW’s long-running M30 family, known for its smoothness and durability. The ‘B28’ designation signifies the 2.8-liter displacement. It featured a cast iron block and an aluminum cylinder head, employing a single overhead camshaft (SOHC) design with two valves per cylinder. Fuel delivery was managed by Bosch Motronic multi-port fuel injection, a significant advancement over earlier carbureted BMW engines. This system allowed for precise fuel metering and improved emissions control. The automatic transmission paired with the M30B28 was a three-speed unit, designed to provide comfortable and effortless shifting. While not as sporty as a manual transmission, it was well-suited to the 528i’s grand touring character.
Driving Characteristics
The 528i Automatic offered a distinctly different driving experience compared to its manual transmission counterparts or the higher-performance 535i. The three-speed automatic, while smooth, resulted in slightly slower acceleration times. The gear ratios were optimized for cruising comfort rather than outright performance. The automatic transmission did sap some of the engine’s potential, but the 528i still provided ample power for everyday driving and highway passing. The torque converter multiplied engine torque at lower speeds, providing good off-the-line acceleration, but the lack of a fourth gear meant higher engine speeds at highway velocities, potentially impacting fuel economy. The steering remained precise and responsive, characteristic of BMW’s engineering philosophy, and the suspension provided a comfortable yet controlled ride.
Equipment & Trim Levels
The 528i Automatic typically came well-equipped, reflecting its position as a premium model. Standard features included power windows, power door locks, and a sunroof. The interior was typically trimmed with cloth upholstery, although leather was available as an option. The dashboard layout was functional and driver-focused, with clearly marked gauges and controls. Optional extras included air conditioning, a premium sound system, and heated seats. The 528i Automatic often featured a wood trim on the dashboard and door panels, adding a touch of luxury to the interior.
Chassis & Braking
The E28 5 Series utilized a robust chassis with independent suspension at all four wheels. The front suspension employed MacPherson struts, while the rear featured a semi-trailing arm design. This setup provided a good balance of ride comfort and handling precision. The 528i Automatic was equipped with disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was available as an option, further enhancing safety. Stabilizer bars were fitted to both the front and rear axles, reducing body roll during cornering. The suspension tuning was generally softer than that of the 535i, prioritizing comfort over outright sportiness.
Market Reception & Comparison
The 528i Automatic was generally well-received by automotive critics. It was praised for its smooth engine, comfortable ride, and well-appointed interior. However, some reviewers noted that the automatic transmission detracted from the car’s overall sporting character. Compared to the manual transmission 528i, the automatic version offered less driver engagement. Against the 535i, the 528i Automatic was less powerful and less focused on performance, but it was also more affordable and offered better fuel economy. The 528i Automatic appealed to buyers who prioritized comfort and convenience over outright performance.
Legacy
The BMW E28 528i Automatic has become a sought-after classic among BMW enthusiasts. The M30B28 engine is known for its reliability and longevity, and the three-speed automatic transmission, while not the most modern, is generally durable. Well-maintained examples are increasingly rare and command a premium in the used car market. The E28 5 Series, in general, is considered a pivotal model in BMW’s history, establishing the brand’s reputation for building high-quality, sporty, and luxurious automobiles. The 528i Automatic, while often overshadowed by its more powerful siblings, remains a desirable and rewarding classic car for those seeking a refined and comfortable driving experience.
