The BMW 4 Series Coupe (F32) 428i, produced from October 2013 to March 2016, represented a key offering in BMW’s expanding lineup of premium compact coupes. Positioned as a mid-range variant within the F32 generation, the 428i aimed to balance performance and efficiency, appealing to buyers seeking a sporty driving experience without the higher price tag of the flagship 435i. It served as the successor to the 3 Series Coupe (E92), marking BMW’s decision to spin off the coupe and convertible models into the separate 4 Series designation. The 428i was primarily marketed towards North America and Europe, offering a sophisticated alternative to rivals like the Audi A5 Coupe and Mercedes-Benz C-Class Coupe.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (F32) |
| Type (Engine) | 428i (245 Hp) |
| Start of production | October, 2013 |
| End of production | March, 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (NEDC) | 8.8-8.9 l/100 km (26.7 – 26.4 US mpg, 32.1 – 31.7 UK mpg, 11.4 – 11.2 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 5.3 l/100 km (44.4 US mpg, 53.3 UK mpg, 18.9 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 6.6-6.7 l/100 km (35.6 – 35.1 US mpg, 42.8 – 42.2 UK mpg, 15.2 – 14.9 km/l) |
| CO2 emissions (NEDC) | 154-156 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.9 sec |
| Acceleration 0 – 62 mph | 5.9 sec |
| Acceleration 0 – 60 mph | 5.6 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.9 kg/Hp, 169 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 241.4 Nm/tonne |
| Power | 245 Hp @ 5000-6500 rpm |
| Power per litre | 122.7 Hp/l |
| 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-scroll turbo, Intercooler |
| Valvetrain | Double-VANOS, VALVETRONIC |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Coolant | 7.2 l (7.61 US qt | 6.34 UK qt) |
| Kerb Weight | 1450 kg (3196.7 lbs.) |
| Max. weight | 1970 kg (4343.11 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 445 l (15.72 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 (8%) | 1700 kg (3747.86 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.) |
| Width including mirrors | 2017 mm (79.41 in.) |
| Height | 1377 mm (54.21 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1545 mm (60.83 in.) |
| Rear (Back) track | 1594 mm (62.76 in.) |
| Front overhang | 787 mm (30.98 in.) |
| Rear overhang | 1041 mm (40.98 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 | 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, manual transmission |
| Front suspension | Spring Strut, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| 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 | Front wheel tires: 225/50 R17; 225/45 R18; 225/40 R19; 225/35 R20Rear wheel tires: 225/50 R17; 225/45 R18; 255/40 R18; 255/35 R19; 255/30 R20 |
| Wheel rims size | Front wheel rims: 7.5J x 17; 8J x 18; 8J x 19; 8J x 20Rear wheel rims: 7.5J x 17; 8J x 18; 8.5J x 18; 8.5J x 19; 8.5J x 20 |
Powertrain & Engine Architecture
The heart of the 428i is BMW’s N20B20A 2.0-liter turbocharged inline-four engine. This engine is a cornerstone of BMW’s EfficientDynamics philosophy, combining direct fuel injection, a twin-scroll turbocharger, and variable valve timing (Double-VANOS and VALVETRONIC) to deliver a balance of power and fuel economy. The N20 engine produces 245 horsepower at 5,000-6,500 rpm and 258 lb-ft of torque between 1,250 and 4,800 rpm. The turbocharger’s design minimizes turbo lag, providing responsive acceleration. The engine is longitudinally mounted, driving the rear wheels. The 428i was typically equipped with an 8-speed automatic transmission (ZF 8HP), known for its smooth shifting and efficiency. A 6-speed manual transmission was also available, though less common in the US market.
Driving Characteristics
The 428i with the 8-speed automatic offers a refined and comfortable driving experience. The automatic transmission is well-tuned, providing quick and seamless gear changes. While not as overtly sporty as the 435i, the 428i delivers ample power for everyday driving and spirited backroad excursions. The 0-60 mph time of around 5.6 seconds is respectable. The automatic transmission’s gear ratios are optimized for both acceleration and fuel efficiency. Compared to the manual transmission, the automatic prioritizes ease of use and fuel economy, while the manual offers a more engaging driving experience. The 428i’s weight distribution contributes to balanced handling, making it a capable and enjoyable car to drive.
Equipment & Trim Levels
The 428i came standard with a comprehensive list of features, including leatherette upholstery, automatic climate control, a 6.5-inch iDrive infotainment system, and power-adjustable front seats. Optional extras included leather upholstery, a premium sound system, navigation, a sunroof, and various driver-assistance features like lane departure warning and blind-spot monitoring. Trim levels were relatively simple, with most customization occurring through individual options. Sport Line and Luxury Line packages were available, offering unique exterior and interior styling cues.
Chassis & Braking
The F32 4 Series utilizes a MacPherson strut front suspension and a multi-link rear suspension. The suspension is tuned to provide a balance between comfort and handling. The 428i typically featured ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) were standard safety features. The chassis is relatively lightweight, contributing to the car’s agility. The standard tire size varied depending on the wheel size, ranging from 225/50 R17 to 255/30 R20.
Market Reception & Comparison
The 428i was generally well-received by automotive critics. It was praised for its refined driving experience, fuel efficiency, and stylish design. However, some critics noted that the 2.0-liter engine lacked the outright performance of the 3.0-liter inline-six found in the 435i. Compared to the 435i, the 428i offered a more affordable entry point into the 4 Series lineup, appealing to buyers who prioritized efficiency and value. Fuel economy figures averaged around 35 mpg combined, making it a relatively economical coupe. Reliability has been generally good, with the N20 engine proving to be a durable unit, although some owners have reported issues with oil leaks and cooling system components.
Legacy
The BMW 428i (F32) remains a popular choice in the used car market. Its combination of style, performance, and fuel efficiency makes it an attractive option for buyers seeking a premium compact coupe. The N20 engine is known for its longevity, but regular maintenance is crucial to prevent potential issues. Parts availability is good, and the car is relatively easy to maintain. The F32 4 Series, including the 428i, helped solidify BMW’s position as a leader in the premium coupe segment, and continues to be appreciated by enthusiasts for its balanced driving dynamics and sophisticated design.
