Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (F32) |
| Type (Engine) | 435i (306 Hp) Steptronic |
| 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) | 10.2-10.6 l/100 km (23.1 – 22.2 US mpg, 27.7 – 26.6 UK mpg, 9.8 – 9.4 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 5.5 l/100 km (42.8 US mpg, 51.4 UK mpg, 18.2 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 7.2-7.4 l/100 km (32.7 – 31.8 US mpg, 39.2 – 38.2 UK mpg, 13.9 – 13.5 km/l) |
| CO2 emissions (NEDC) | 169-172 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.1 sec |
| Acceleration 0 – 62 mph | 5.1 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5 kg/Hp, 200.7 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 262.3 Nm/tonne |
| Power | 306 Hp @ 5800-6000 rpm |
| Power per litre | 102.7 Hp/l |
| Torque | 400 Nm @ 1200-5000 rpm (295.02 lb.-ft. @ 1200-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N55B30A |
| Engine displacement | 2979 cm3 (181.79 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 89.6 mm (3.53 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | Double-VANOS, VALVETRONIC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 7.2 l (7.61 US qt | 6.34 UK qt) |
| Kerb Weight | 1525 kg (3362.05 lbs.) |
| Max. weight | 2045 kg (4508.45 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%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load with brakes (12%) | 1700 kg (3747.86 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 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) | 0.30 |
| 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 | 8 gears, automatic transmission Steptronic |
| 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 R20; Rear 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 20; Rear wheel rims: 7.5J x 17; 8J x 18; 8.5J x 18; 8.5J x 19; 8.5J x 20 |
The BMW 435i Steptronic, built on the F32 platform (shared with the 3 Series), represented BMW’s continued refinement of the coupe experience. The F32 generation marked a departure from the previous 3 Series Coupe designation, establishing the 4 Series as a distinct model range. The 435i, equipped with the eight-speed Steptronic automatic transmission, was designed to offer a seamless and responsive driving experience, appealing to those who preferred the convenience of an automatic without sacrificing performance. It was a popular choice for buyers who wanted a sporty, luxurious coupe for daily driving and occasional spirited excursions.
Powertrain & Engine Architecture
At the heart of the 435i Steptronic lies the N55B30A, a 3.0-liter inline-six cylinder engine. This engine is a cornerstone of BMW’s engineering prowess, known for its smooth power delivery and responsiveness. The N55 utilizes direct fuel injection, ensuring precise fuel metering and optimized combustion. It also incorporates BMW’s VALVETRONIC variable valve timing and Double-VANOS variable valve lift systems, allowing for exceptional control over the engine’s breathing and maximizing efficiency. The engine is turbocharged, with an intercooler to cool the intake air, boosting power output to 306 horsepower and 400 Nm (295 lb-ft) of torque. The eight-speed Steptronic automatic transmission is a sophisticated unit, offering quick and smooth gear changes. It features adaptive shift programs that adjust to the driver’s style and driving conditions. Manual shift control is also available via steering wheel-mounted paddles.
Driving Characteristics
The 435i Steptronic delivers a compelling driving experience characterized by strong acceleration and balanced handling. The combination of the turbocharged inline-six and the eight-speed automatic results in a 0-60 mph time of around 4.8 seconds. The Steptronic transmission’s close gear ratios keep the engine in its optimal power band, providing readily available torque for confident overtaking and merging. Compared to the six-speed manual version, the Steptronic offers slightly slower acceleration due to inherent transmission losses, but it compensates with greater convenience and refinement. Compared to the 428i, the 435i provides a noticeable increase in power and torque, resulting in a more engaging and exhilarating driving experience. The chassis is well-tuned, offering a comfortable ride without sacrificing handling precision.
Equipment & Trim Levels
The 435i Steptronic came standard with a generous array of features, including leather upholstery, power-adjustable front seats with memory function, a premium sound system, and BMW’s iDrive infotainment system with a high-resolution display. Available options included a navigation system, a head-up display, adaptive cruise control, and a Harman Kardon surround sound system. Interior trim options ranged from wood veneers to aluminum accents, allowing buyers to personalize the cabin to their taste. Exterior options included various wheel designs, paint colors, and aerodynamic enhancements.
Chassis & Braking
The 435i Steptronic features a sophisticated chassis designed to deliver a balance of comfort and handling. The front suspension utilizes MacPherson struts with a transverse stabilizer bar, while the rear suspension employs a multi-link setup, also with a stabilizer bar. This configuration provides excellent wheel control and minimizes body roll. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) is standard, enhancing safety and stability during emergency braking maneuvers. The steering is electrically assisted, offering precise and responsive control.
Market Reception & Comparison
The 435i Steptronic was generally well-received by automotive critics, who praised its powerful engine, refined transmission, and comfortable ride. Some reviewers noted that the automatic transmission, while smooth and responsive, didn’t quite match the engagement of the manual gearbox. However, the convenience and ease of use of the Steptronic were widely appreciated. Compared to the 428i, the 435i offered a significant performance upgrade, justifying the higher price tag for enthusiasts. Fuel economy was respectable for a performance coupe, with combined figures ranging from 32.7 to 31.8 US mpg. Reliability was generally good, although some owners reported minor issues with the cooling system and oil leaks.
Legacy
The BMW 435i Steptronic remains a desirable used car today, appreciated for its blend of performance, luxury, and refinement. The N55 engine is known for its durability, although regular maintenance is essential to prevent oil leaks and ensure optimal performance. The eight-speed Steptronic transmission has proven to be a reliable unit, with few reported issues. The F32 4 Series, and particularly the 435i, has established itself as a modern classic, offering a compelling alternative to more contemporary sports coupes. Its timeless design and engaging driving dynamics continue to attract enthusiasts seeking a premium coupe experience.
