The BMW 4 Series Gran Coupe (F36) 418d Steptronic, produced from 2014 to 2015, represents BMW’s entry point into the 4 Series Gran Coupe lineup, offering a blend of practicality and efficiency. Positioned as a more economical alternative to its higher-powered siblings, the 418d aimed to attract buyers seeking a stylish, five-door coupe with lower running costs. It was built on the F36 chassis, part of the broader F30 3 Series platform, and offered a more refined driving experience than the standard 3 Series Touring wagon, while providing similar cargo capacity. This variant was primarily sold in the European market, where diesel engines held significant popularity due to fuel efficiency and tax incentives.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (F36) |
| Type (Engine) | 418d (143 Hp) Steptronic |
| Start of production | 2014 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.5 l/100 km (42.8 US mpg, 51.4 UK mpg, 18.2 km/l) |
| Fuel consumption (extra urban) | 4 l/100 km (58.8 US mpg, 70.6 UK mpg, 25 km/l) |
| Fuel consumption (combined) | 4.5 l/100 km (52.3 US mpg, 62.8 UK mpg, 22.2 km/l) |
| CO2 emissions | 119 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.1 sec |
| Acceleration 0 – 62 mph | 9.1 sec |
| Acceleration 0 – 60 mph | 8.6 sec |
| Maximum speed | 213 km/h (132.35 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 10.6 kg/Hp, 94.7 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 211.9 Nm/tonne |
| Power | 143 Hp @ 4000 rpm |
| Power per litre | 71.7 Hp/l |
| Torque | 320 Nm @ 1750-2500 rpm (236.02 lb.-ft. @ 1750-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N47D20C |
| Engine displacement | 1995 cm3 (121.74 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 5.2 l (5.49 US qt | 4.58 UK qt) |
| Coolant | 7 l (7.4 US qt | 6.16 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 | 57 l (15.06 US gal | 12.54 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 | 1557 mm (61.3 in.) |
| Rear (Back) track | 1605 mm (63.19 in.) |
| Ride height (ground clearance) | 130 mm (5.12 in.) |
| Drag coefficient (Cd) | 0.27 |
| 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 | 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 | 205/60 R16 92V |
| Wheel rims size | 6.0J x 16 |
Powertrain & Engine Architecture
The 418d Gran Coupe utilizes the BMW N47D20C engine, a 2.0-liter inline-four cylinder diesel engine. This engine is a member of the N47 family, known for its efficiency and relatively compact size. It employs a second-generation common rail direct injection system, delivering fuel at pressures up to 1800 bar for optimized combustion. The N47D20C is equipped with a single twin-scroll turbocharger with variable geometry turbine (VGT) technology, enhancing low-end torque and responsiveness. The engine also features an intercooler to further cool the intake air. The Steptronic transmission is an 8-speed automatic gearbox, offering smooth shifts and contributing to fuel efficiency. This transmission allows for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The 418d Steptronic, with its 143 horsepower and 320 Nm (236 lb-ft) of torque, provides adequate performance for everyday driving. Acceleration from 0 to 62 mph takes approximately 9.1 seconds, and top speed is rated at 132.35 mph. While not a performance-oriented variant, the engine delivers a usable amount of power, particularly in the mid-range. The 8-speed automatic transmission is well-tuned, providing smooth and timely gear changes. Compared to the more powerful 420d or 435i models, the 418d feels less urgent in its acceleration, but it offers a more relaxed and fuel-efficient driving experience. The automatic transmission’s gear ratios are optimized for both fuel economy and drivability, with taller gears for highway cruising and shorter gears for quicker acceleration.
Equipment & Trim Levels
The 418d Steptronic typically came equipped with a standard level of features including automatic climate control, a BMW Professional radio system with iDrive controller, power windows, and electrically adjustable mirrors. Interior upholstery was typically cloth, with options for leather upgrades. Standard safety features included ABS, stability control, and multiple airbags. Optional extras included navigation system, upgraded sound system, sunroof, and various driver assistance systems like parking sensors and lane departure warning. Trim levels were relatively limited for the 418d, with most customization options available as individual upgrades rather than distinct packages.
Chassis & Braking
The 4 Series Gran Coupe features a sophisticated chassis design with independent suspension all around. The front suspension utilizes coil springs and struts, while the rear employs a multi-link setup. This configuration provides a good balance between ride comfort and handling precision. The 418d typically came equipped with ventilated disc brakes on all four wheels, providing adequate stopping power. The ABS system helps to prevent wheel lockup during hard braking. The suspension tuning was generally geared towards comfort, but the car still offered a reasonably engaging driving experience, especially when equipped with the optional sport suspension.
Market Reception & Comparison
The 418d Steptronic was generally well-received by automotive critics as a practical and efficient option within the 4 Series Gran Coupe range. It was praised for its fuel economy, comfortable ride, and stylish design. However, some reviewers noted that the engine lacked the outright performance of its more powerful siblings. Compared to the 420d, the 418d offered lower running costs but sacrificed some performance. Against the 435i, the difference was even more pronounced. The 418d’s fuel economy was a key selling point, achieving around 52.3 US mpg on the combined cycle, making it an attractive option for drivers covering long distances.
Legacy
The N47 engine family, including the N47D20C found in the 418d, has proven to be generally reliable, although some early models experienced issues with timing chain tensioners. Regular maintenance, including oil changes and timing chain inspections, is crucial for long-term reliability. On the used car market, the 418d Gran Coupe represents a relatively affordable entry point into BMW ownership. Its fuel efficiency and practicality continue to make it a popular choice for buyers seeking a stylish and economical coupe. While not a collector’s item, well-maintained examples hold their value reasonably well, particularly those with a full service history.
