The BMW 4 Series Coupe (F32) 420d xDrive Steptronic, produced from 2013 to 2015, represents a compelling entry point into the premium coupe market. Positioned as a diesel-powered variant within the broader F32 4 Series lineup, it aimed to deliver a balance of performance, efficiency, and all-weather capability. This model utilized BMW’s xDrive all-wheel-drive system paired with a Steptronic eight-speed automatic transmission, making it a popular choice for drivers in regions with inclement weather or those prioritizing ease of driving. It served as a more economical and practical alternative to the higher-performance 435i and 428i models, while offering a more refined experience than the base 420i.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Coupe (F32) |
| Type (Engine) | 420d (184 Hp) xDrive Steptronic |
| Start of production | 2013 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 5.6-5.8 l/100 km (42 – 40.6 US mpg, 50.4 – 48.7 UK mpg, 17.9 – 17.2 km/l) |
| Fuel consumption (extra urban) | 4.2-4.3 l/100 km (56 – 54.7 US mpg, 67.3 – 65.7 UK mpg, 23.8 – 23.3 km/l) |
| Fuel consumption (combined) | 4.7-4.9 l/100 km (50 – 48 US mpg, 60.1 – 57.6 UK mpg, 21.3 – 20.4 km/l) |
| CO2 emissions | 124-128 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 62 mph | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 229 km/h (142.29 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8.4 kg/Hp, 119.5 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 246.8 Nm/tonne |
| Power | 184 Hp @ 4000 rpm |
| Torque | 380 Nm @ 1750-2500 rpm (280.27 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 | 1540 kg (3395.12 lbs.) |
| Max. weight | 2060 kg (4541.52 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 445 l (15.72 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 | 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.) |
| Height | 1392 mm (54.8 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) | 145 mm (5.71 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle (turning diameter) | 11.8 m (38.71 ft.) |
| Drive wheel | All wheel drive (4×4) |
| 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; 225/45 R18; 255/40 R18; 225/40 R19; 255/35 R19 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 18; 8J x 19; 8.5J x 19 |
Powertrain & Engine Architecture
The 420d xDrive Steptronic is powered by the BMW N47D20C engine, a 2.0-liter inline-four diesel engine. This engine is a member of BMW’s highly successful N47 family, known for its efficiency and refinement. The N47D20C utilizes a second-generation common rail direct fuel injection system, delivering fuel at pressures up to 1800 bar for optimized combustion. A twin-scroll turbocharger with variable geometry turbine (VGT) technology enhances low-end torque and responsiveness. The engine also features an intercooler to further improve intake air density. The engine produces 184 horsepower at 4000 rpm and 380 Nm (280 lb-ft) of torque between 1750 and 2500 rpm. The Steptronic eight-speed automatic transmission is a crucial component, offering smooth and quick shifts. It features adaptive shift programs that adjust to the driver’s style and road conditions. The xDrive all-wheel-drive system employs a multi-plate clutch to distribute torque between the front and rear axles, providing enhanced traction and stability.
Driving Characteristics
The 420d xDrive Steptronic delivers a comfortable and refined driving experience. While not as overtly sporty as the higher-powered 4 Series variants, it offers ample performance for everyday driving and long-distance cruising. The 380 Nm of torque provides strong acceleration from low engine speeds, making overtaking maneuvers effortless. The eight-speed automatic transmission contributes to relaxed highway cruising, with well-chosen gear ratios keeping the engine within its optimal power band. Compared to the manual transmission versions of the 420d, the Steptronic automatic prioritizes convenience and smoothness over outright driver engagement. The xDrive system provides excellent grip in all weather conditions, inspiring confidence on slippery surfaces. The steering is precise and well-weighted, although it lacks the ultimate feel of some competitors.
Equipment & Trim Levels
The 420d xDrive Steptronic typically came equipped with a generous level of standard features. These included automatic climate control, a BMW iDrive infotainment system with a 6.5-inch display, power-adjustable front seats, and a leather-wrapped steering wheel. Optional extras included a larger iDrive screen, navigation system, premium sound system, heated seats, and a sunroof. Interior upholstery options ranged from standard cloth to premium leather. Trim levels varied depending on the market, but generally offered packages that bundled together popular options, such as the Sport Line, Luxury Line, and M Sport packages, each adding unique styling cues and equipment upgrades.
Chassis & Braking
The F32 4 Series features a sophisticated chassis design. The front suspension utilizes independent coil springs and struts, while the rear suspension employs a multi-link setup. This configuration provides a good balance between ride comfort and handling precision. The 420d xDrive Steptronic is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS), electronic stability control (ESC), and traction control are standard safety features. The xDrive system’s torque vectoring capabilities further enhance stability and handling by selectively distributing torque to individual wheels.
Market Reception & Comparison
The 420d xDrive Steptronic was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and all-weather capability. However, some reviewers noted that the engine lacked the outright performance of the 428i and 435i models. Compared to the rear-wheel-drive 420d, the xDrive version offered superior traction and stability, but at a slight weight penalty. Fuel economy figures were consistently impressive, with combined cycle consumption averaging around 4.7-4.9 l/100 km (50-48 US mpg). Reliability has been generally good, although some owners have reported issues with the diesel particulate filter (DPF) and turbocharger.
Legacy
The BMW 4 Series Coupe (F32) 420d xDrive Steptronic remains a popular choice in the used car market. Its combination of efficiency, practicality, and all-weather capability makes it a compelling option for buyers seeking a premium coupe. The N47D20C engine is known for its durability, but regular maintenance, including oil changes and DPF regeneration, is essential. The Steptronic transmission is also generally reliable, but it’s important to check for smooth shifting and proper operation. Overall, the 420d xDrive Steptronic represents a well-rounded and capable coupe that continues to offer a rewarding driving experience.
