The BMW 4 Series Gran Coupe (F36) 420d xDrive, produced from 2015 to 2016, represents a compelling blend of practicality and performance within the 4 Series lineup. Positioned as a mid-range offering, it aimed to provide a more efficient and accessible entry point into the Gran Coupe body style, while still delivering the BMW driving experience. This variant combined a 2.0-liter turbocharged diesel engine with BMW’s xDrive all-wheel-drive system, offering a balance of fuel economy, torque, and all-weather capability. It was part of the F36 generation, which itself was based on the F30 3 Series platform, extending the coupe’s appeal with a five-door configuration and increased cargo space.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (F36) |
| Type (Engine) | 420d (190 Hp) xDrive |
| Start of production | 2015 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.6-5.9 l/100 km (42 – 39.9 US mpg) |
| Fuel consumption (extra urban) | 4.0-4.3 l/100 km (58.8 – 54.7 US mpg) |
| Fuel consumption (combined) | 4.6-4.9 l/100 km (51.1 – 48 US mpg) |
| CO2 emissions | 121-129 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.6 sec |
| Acceleration 0 – 62 mph | 7.6 sec |
| Acceleration 0 – 60 mph | 7.2 sec |
| Maximum speed | 235 km/h (146.02 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8.4 kg/Hp, 119.1 Hp/tonne |
| Weight-to-torque ratio | 4 kg/Nm, 250.8 Nm/tonne |
| Power | 190 Hp @ 4000 rpm |
| Torque | 400 Nm @ 1750-2500 rpm (295.02 lb.-ft. @ 1750-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B47D20A |
| 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 l (5.28 US qt | 4.4 UK qt) |
| Coolant | 7 l (7.4 US qt | 6.16 UK qt) |
| Kerb Weight | 1595 kg (3516.37 lbs.) |
| Max. weight | 2155 kg (4750.96 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 | 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 | 1404 mm (55.28 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1544 mm (60.79 in.) |
| Rear (Back) track | 1590 mm (62.6 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 | 6 gears, manual transmission |
| 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 94V; 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 heart of the 420d xDrive is the BMW B47D20A 2.0-liter inline-four diesel engine. This engine is a member of BMW’s modular engine family, known for its efficiency and refinement. It utilizes a second-generation common rail direct injection system operating at pressures up to 2,000 bar, ensuring precise fuel delivery and optimized combustion. The engine is equipped with a twin-scroll turbocharger with variable geometry turbine (VGT) technology, which minimizes turbo lag and enhances low-end torque. The B47 engine also features a closed-crankcase ventilation system with oil separator, reducing emissions and oil consumption. The 6-speed manual transmission was standard, offering precise shifts and a direct connection to the engine. The transmission’s gear ratios were tuned to maximize fuel efficiency and provide adequate acceleration.
Driving Characteristics
The 420d xDrive offered a comfortable and refined driving experience. While not overtly sporty, the 400 Nm (295 lb-ft) of torque available from 1750-2500 rpm provided ample pulling power for everyday driving and overtaking maneuvers. The xDrive all-wheel-drive system enhanced traction, particularly in inclement weather, providing a surefooted feel. Compared to the more powerful 428i or 435i models, the 420d prioritized fuel economy and ease of driving over outright performance. The manual transmission, while engaging, had slightly longer gearing to further improve efficiency. Acceleration from 0-60 mph took around 7.2 seconds, making it competitive within its class.
Equipment & Trim Levels
The 420d xDrive typically came standard with features such as automatic climate control, power windows, power mirrors, and a multi-function steering wheel. Interior upholstery was generally cloth, with leather options available as an upgrade. The standard infotainment system included a 6.5-inch display screen, while larger screens and navigation systems were available as options. Common optional extras included a sunroof, heated seats, parking sensors, and a premium sound system. Trim levels varied by market, but generally offered packages that bundled popular options together.
Chassis & Braking
The F36 Gran Coupe utilized a MacPherson strut front suspension and a multi-link rear suspension, providing a good balance of ride comfort and handling precision. The xDrive system distributed power between the front and rear axles as needed, optimizing traction and stability. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) was standard, along with electronic stability control and traction control systems.
Market Reception & Comparison
The 420d xDrive was generally well-received by automotive critics as a practical and efficient option within the 4 Series range. It was praised for its fuel economy, comfortable ride, and all-weather capability. However, some reviewers noted that the engine lacked the outright performance of its more powerful siblings. Compared to the 428i, the 420d offered significantly better fuel economy but slower acceleration. Against competitors like the Audi A5 Sportback and the Mercedes-Benz C-Class Coupe, the 420d xDrive held its own in terms of refinement and driving dynamics.
Legacy
The B47 engine, found in the 420d xDrive, has proven to be a relatively reliable powertrain, although some early models experienced issues with timing chain tensioners. Proper maintenance, including regular oil changes and timely replacement of wear items, is crucial for long-term reliability. On the used car market, the 420d xDrive represents a good value proposition, offering a blend of style, practicality, and efficiency. Its all-wheel-drive system and relatively low running costs make it an attractive option for buyers seeking a premium coupe with everyday usability.
