The BMW 4 Series Gran Coupe (F36) 428i Steptronic, produced from 2014 to 2016, represents BMW’s entry into the four-door coupe market, successfully merging the aesthetic appeal of a coupe with the practicality expected of a sedan. Positioned as a mid-range offering within the F36 Gran Coupe lineup, it sat between the entry-level 420i and the higher-performance 435i and later 440i models. This variant aimed to strike a balance between performance, luxury, and fuel efficiency, appealing to buyers who desired a stylish and capable grand tourer. The 428i utilized BMW’s then-current turbocharged engine technology coupled with an eight-speed automatic transmission, delivering a refined driving experience.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (F36) |
| Type (Engine) | 428i (245 Hp) Steptronic |
| Start of production | 2014 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 8.2 l/100 km (28.7 US mpg) |
| Fuel consumption (extra urban) | 5.2 l/100 km (45.2 US mpg) |
| Fuel consumption (combined) | 6.3 l/100 km (37.3 US mpg) |
| CO2 emissions | 147 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6 sec |
| Acceleration 0 – 62 mph | 6 sec |
| Acceleration 0 – 60 mph | 5.7 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.2 kg/Hp |
| Weight-to-torque ratio | 4.4 kg/Nm |
| Power | 245 Hp @ 5000-6500 rpm |
| Torque | 350 Nm @ 1250-4800 rpm (258.15 lb.-ft. @ 1250-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N20B20A |
| Engine displacement | 1997 cm3 (121.86 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90.1 mm (3.55 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Coolant | 7.6 l (8.03 US qt | 6.69 UK qt) |
| Kerb Weight | 1530 kg (3373.07 lbs.) |
| Max. weight | 2090 kg (4607.66 lbs.) |
| Max load | 560 kg (1234.59 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Trunk (boot) space – maximum | 1300 l (45.91 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1600 kg (3527.4 lbs.) |
| Permitted trailer load without brakes | 745 kg (1642.44 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4638 mm (182.6 in.) |
| Width | 1825 mm (71.85 in.) |
| Height | 1389 mm (54.69 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1545 mm (60.83 in.) |
| Rear (Back) track | 1594 mm (62.76 in.) |
| Ride height (ground clearance) | 130 mm (5.12 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle (turning diameter) | 11.3 m (37.07 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Independent coil spring |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/50 R17 94W |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
The 428i Gran Coupe’s powertrain centers around BMW’s N20B20A 2.0-liter inline-four cylinder engine. This engine exemplifies BMW’s advancements in forced induction. It incorporates a single twin-scroll turbocharger, direct fuel injection, and variable valve timing (VANOS) and variable valve lift (Valvetronic) technologies. These systems work together to provide a broad and responsive torque curve. The N20 engine is recognized for its efficiency and relatively smooth operation. The Steptronic eight-speed automatic transmission is integral to the drivetrain. It offers both fully automatic operation and manual shifting via steering wheel-mounted paddles. The transmission’s programming prioritizes a balance of fuel economy and performance, with quick and smooth gear changes. The engine is longitudinally mounted, driving the rear wheels, a hallmark of BMW engineering.
Driving Characteristics
The 428i Steptronic provides a comfortable and engaging driving experience. While not as aggressively sporty as the 435i, it delivers sufficient power for everyday driving and spirited performance. The 245 horsepower and 350 lb-ft of torque are readily available thanks to the turbocharger, providing strong acceleration from low engine speeds. The eight-speed automatic transmission contributes to smooth and efficient power delivery. Compared to the available six-speed manual transmission on other 4 Series models, the Steptronic offers quicker acceleration due to its closer gear ratios and faster shift times. However, some driving enthusiasts might find the automatic transmission less engaging than the manual option. The suspension is tuned for a balance of comfort and handling, offering a relatively compliant ride while maintaining good body control during cornering.
Equipment & Trim Levels
The 428i Gran Coupe came standard with a comprehensive set of features, including leatherette upholstery, automatic climate control, a power-adjustable driver’s seat, and BMW’s iDrive infotainment system with a 6.5-inch display. Optional extras included genuine leather upholstery, a premium sound system, navigation, a sunroof, and various driver-assistance features like lane departure warning and blind-spot monitoring. The interior design is characteristic of BMW, emphasizing functionality and a driver-focused layout. The Gran Coupe’s five-door configuration provides easier access to the rear seats compared to the standard 4 Series Coupe.
Chassis & Braking
The F36 4 Series Gran Coupe features a sophisticated chassis design. The front suspension utilizes independent coil springs and struts, while the rear suspension employs an independent multi-link setup. This configuration balances ride comfort and handling precision. The 428i is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. An anti-lock braking system (ABS) is standard, along with electronic stability control (ESC) and traction control. The steering system is a rack-and-pinion setup with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The 428i Gran Coupe received generally positive reviews from automotive critics. It was praised for its stylish design, comfortable ride, and strong performance. However, some reviewers noted that the 2.0-liter engine, while capable, lacked the distinct character and sound of the larger six-cylinder engines available in other 4 Series models. Compared to the 435i, the 428i offered a more affordable entry point into the 4 Series range, but with a noticeable reduction in performance. In terms of fuel economy, the 428i was more efficient than the 435i, making it a more practical choice for daily commuting. Reliability reports suggest the N20 engine is generally reliable, though potential owners should be aware of possible oil leaks and cooling system issues.
Legacy
The BMW 428i Gran Coupe (F36) remains a popular choice in the used car market. Its combination of style, performance, and practicality makes it an attractive option for buyers seeking a premium four-door coupe. The N20 engine, while not without potential issues, is generally considered a durable and capable powerplant. With proper maintenance, a well-maintained 428i Gran Coupe can provide many years of reliable service. The F36 generation 4 Series Gran Coupe helped establish BMW’s presence in the growing four-door coupe segment, and the 428i variant played a significant role in attracting a broader range of buyers to the brand.
