The BMW 4 Series Gran Coupe (F36), specifically the 418i Steptronic variant produced from 2017 to 2019, represents a compelling entry point into the 4 Series lineup. Positioned as a more accessible option within the Gran Coupe body style, it offered a blend of practicality, efficiency, and the BMW driving experience. This facelifted version of the F36, introduced in 2017, featured updated styling cues, revised technology, and a refined engine range, including the 1.5-liter turbocharged three-cylinder engine powering the 418i. It was designed to appeal to buyers seeking a stylish and versatile vehicle without the higher price tag of the more powerful six-cylinder models.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (F36, facelift 2017) |
| Type (Engine) | 418i (136 Hp) Steptronic |
| Start of production | 2017 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 6.5-6.9 l/100 km (36.2 – 34.1 US mpg, 43.5 – 40.9 UK mpg, 15.4 – 14.5 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 4.5-4.9 l/100 km (52.3 – 48 US mpg, 62.8 – 57.6 UK mpg, 22.2 – 20.4 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 5.2-5.6 l/100 km (45.2 – 42 US mpg, 54.3 – 50.4 UK mpg, 19.2 – 17.9 km/l) |
| CO2 emissions (NEDC) | 122-130 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.6 sec |
| Acceleration 0 – 62 mph | 9.6 sec |
| Acceleration 0 – 60 mph | 9.1 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 11.1 kg/Hp, 90.1 Hp/tonne |
| Weight-to-torque ratio | 6.9 kg/Nm, 145.7 Nm/tonne |
| Power | 136 Hp @ 4400 rpm |
| Power per litre | 90.7 Hp/l |
| Torque | 220 Nm @ 1250-4300 rpm (162.26 lb.-ft. @ 1250-4300 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B38B15A |
| Engine displacement | 1499 cm3 (91.47 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | VALVETRONIC, Double-VANOS |
| Engine oil capacity | 4.25 l (4.49 US qt | 3.74 UK qt) |
| Coolant | 7.7 l (8.14 US qt | 6.78 UK qt) |
| Kerb Weight | 1510 kg (3328.98 lbs.) |
| Max. weight | 2070 kg (4563.57 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) |
| Permitted trailer load with brakes (8%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load with brakes (12%) | 1300 kg (2866.01 lbs.) |
| Permitted trailer load without brakes | 695 kg (1532.21 lbs.) |
| Length | 4640 mm (182.68 in.) |
| Width | 1825 mm (71.85 in.) |
| Width including mirrors | 2017 mm (79.41 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.) |
| Front overhang | 787 mm (30.98 in.) |
| Rear overhang | 1043 mm (41.06 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 | 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 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; 8J x 19; 8.5J x 20 |
INTRODUCTION
The BMW 418i Gran Coupe Steptronic, produced between 2017 and 2019, is part of the F36 generation of the 4 Series. This model represents a significant shift for BMW, offering a four-door coupe that blends the sporty aesthetics of a traditional coupe with the practicality of a sedan. The facelifted F36, introduced in 2017, brought with it revised styling, including updated headlights and taillights, as well as interior enhancements. The 418i variant, powered by the B38 1.5-liter three-cylinder engine, served as the entry-level option for the Gran Coupe, targeting buyers who prioritized fuel efficiency and affordability without sacrificing the BMW brand experience.
Powertrain & Engine Architecture
At the heart of the 418i lies the BMW B38B15A 1.5-liter turbocharged three-cylinder engine. This engine is a member of BMW’s modular engine family, known for its compact size and efficiency. It utilizes direct fuel injection, VALVETRONIC variable valve timing, and a twin-scroll turbocharger to deliver a balance of power and economy. The engine produces 136 horsepower at 4400 rpm and 220 Nm (162 lb-ft) of torque between 1250 and 4300 rpm. The engine’s aluminum construction helps to keep weight down. Paired with this engine is the 8-speed Steptronic automatic transmission, a staple in BMW’s lineup. This transmission offers smooth and quick shifts, contributing to both performance and fuel efficiency. The transmission is programmed for comfort and efficiency, with a focus on seamless gear changes.
Driving Characteristics
The 418i Steptronic offers a comfortable and refined driving experience. While not as overtly sporty as its six-cylinder siblings, the 1.5-liter engine provides adequate power for everyday driving. Acceleration from 0 to 60 mph takes approximately 9.1 seconds, and the car has a top speed of 130.49 mph. The Steptronic transmission is well-matched to the engine, providing smooth and timely gear changes. The gear ratios are optimized for fuel efficiency, but also allow for responsive acceleration when needed. Compared to the 420i or 430i models, the 418i feels less urgent in its acceleration, but it offers a more relaxed and fuel-efficient driving experience. The rear-wheel-drive configuration provides a balanced feel, and the suspension is tuned for comfort, absorbing bumps and imperfections in the road effectively.
Equipment & Trim Levels
The 418i Gran Coupe typically came standard with features such as automatic climate control, a 6.5-inch iDrive infotainment system, power-adjustable front seats, and a leather-wrapped steering wheel. Standard safety features included ABS, stability control, and multiple airbags. Optional extras included larger alloy wheels, a premium sound system, navigation, a sunroof, and various driver-assistance systems like lane departure warning and automatic emergency braking. Interior upholstery options typically included cloth or leatherette, with various color choices available. The dashboard layout is typical of BMW, with a driver-focused design and high-quality materials.
Chassis & Braking
The F36 4 Series Gran Coupe utilizes a MacPherson strut front suspension and a multi-link rear suspension. This setup provides a good balance of comfort and handling. The 418i typically featured ventilated disc brakes on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) is standard, enhancing safety during emergency braking situations. The steering is a rack-and-pinion system with electric power assistance, offering precise and responsive steering feel. Stabilizer bars are fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The 418i Gran Coupe was generally well-received by critics as an accessible entry point into the 4 Series range. It was praised for its fuel efficiency, comfortable ride, and stylish design. However, some reviewers noted that the three-cylinder engine lacked the punch of the larger engines available in the lineup. Compared to the 420i, the 418i offered lower running costs but less performance. Against competitors like the Audi A5 Sportback and the Mercedes-Benz C-Class Coupe, the 418i offered a compelling combination of style, practicality, and driving dynamics. Fuel economy figures of 45.2 – 42 US mpg combined made it an attractive option for those prioritizing efficiency.
Legacy
The B38 engine, while relatively new at the time of the 418i’s production, has proven to be a reliable unit. Common issues are relatively minor, often relating to the turbocharger or fuel injectors. The 8-speed Steptronic transmission is also known for its durability. On the used car market, the 418i Gran Coupe represents a good value proposition, offering a stylish and well-equipped vehicle at a more affordable price point than its more powerful siblings. Its fuel efficiency and relatively low maintenance costs make it an attractive option for buyers seeking a practical and enjoyable coupe.
