The BMW 4 Series Gran Coupe (F36) 420d xDrive Steptronic was a four-door coupe produced between 2014 and 2015. Positioned as a mid-range offering within the F36 Gran Coupe lineup, it combined a 2.0-liter turbocharged diesel engine with BMW’s xDrive all-wheel-drive system and an eight-speed Steptronic automatic transmission. This variant aimed to provide a balance of fuel efficiency, performance, and all-weather capability for buyers seeking a practical yet sporty vehicle. It represented BMW’s attempt to cater to a growing market segment desiring coupe-like styling with the added convenience of four doors and a larger cargo area than traditional coupes.
Technical Specifications
| Brand | BMW |
| Model | 4 Series |
| Generation | 4 Series Gran Coupe (F36) |
| Type (Engine) | 420d (184 Hp) xDrive Steptronic |
| Start of production | 2014 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 5.7 l/100 km (41.3 US mpg, 49.6 UK mpg, 17.5 km/l) |
| Fuel consumption (economy) – extra urban | 4.3 l/100 km (54.7 US mpg, 65.7 UK mpg, 23.3 km/l) |
| Fuel consumption (economy) – combined | 4.8 l/100 km (49 US mpg, 58.9 UK mpg, 20.8 km/l) |
| CO2 emissions | 127 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.5 sec |
| Acceleration 0 – 62 mph | 7.5 sec |
| Acceleration 0 – 60 mph | 7.1 sec |
| Maximum speed | 229 km/h (142.29 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8.7 kg/Hp, 115 Hp/tonne |
| Weight-to-torque ratio | 4.2 kg/Nm, 237.5 Nm/tonne |
| Power | 184 Hp @ 4000 rpm |
| Power per litre | 92.2 Hp/l |
| Torque | 380 Nm @ 1750-2750 rpm (280.27 lb.-ft. @ 1750-2750 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 | 1600 kg (3527.4 lbs.) |
| Max. weight | 2160 kg (4761.98 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 | 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 94W |
| Wheel rims size | 7.5J x 17 |
INTRODUCTION
The BMW 420d xDrive Gran Coupe, produced from 2014 to 2015, was a key variant within the F36 4 Series Gran Coupe range. Built on the BMW F30 platform (shared with the 3 Series), the Gran Coupe offered a more stylish and practical alternative to the traditional 3 Series sedan. The 420d xDrive model specifically targeted buyers who desired a blend of efficiency, all-weather traction, and a comfortable driving experience. It served as an entry point into the 4 Series Gran Coupe lineup, offering a more accessible price point compared to the higher-performance 428i and 435i models.
Powertrain & Engine Architecture
At the heart of the 420d xDrive was BMW’s N47D20C 2.0-liter inline-four diesel engine. This engine was a mainstay in BMW’s lineup during this period, known for its fuel efficiency and respectable power output. The N47 featured a common-rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. A single twin-scroll turbocharger with variable geometry turbine (VGT) technology provided boost, enhancing both low-end torque and overall power. The engine also incorporated BMW’s Valvetronic variable valve timing and variable valve lift systems, further optimizing efficiency and responsiveness. The eight-speed Steptronic automatic transmission, a hallmark of BMW’s modern drivetrains, provided smooth and quick shifts. This transmission featured a torque converter and allowed for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The 420d xDrive Gran Coupe offered a composed and refined driving experience. While not overtly sporty, the 184 horsepower and 380 lb-ft of torque provided adequate acceleration for everyday driving and highway cruising. The xDrive all-wheel-drive system ensured confident traction in various weather conditions, distributing power between the front and rear axles as needed. The eight-speed automatic transmission was well-tuned, offering seamless gear changes and contributing to the car’s overall smoothness. Compared to the more powerful 428i and 435i models, the 420d felt less eager to rev, with peak power arriving at 4000 rpm. However, the abundant low-end torque made it a relaxed and effortless cruiser. The gear ratios were optimized for fuel efficiency, with higher gears designed for comfortable highway driving.
Equipment & Trim Levels
The 420d xDrive Gran Coupe came standard with a respectable level of equipment. Standard features typically included automatic climate control, power-adjustable front seats, a BMW iDrive infotainment system with a 6.5-inch display screen, and a suite of safety features such as ABS, stability control, and multiple airbags. Upholstery was typically cloth or a combination of cloth and leatherette. Optional extras included a larger iDrive display screen, navigation system, premium sound system, leather upholstery, heated front seats, a sunroof, and various driver-assistance systems like lane departure warning and adaptive cruise control. Trim levels were relatively simple, with options primarily focused on adding individual features rather than distinct packages.
Chassis & Braking
The F36 Gran Coupe utilized a sophisticated chassis design. The front suspension featured independent coil springs and struts, while the rear suspension employed an independent multi-link setup. This configuration provided a good balance of ride comfort and handling precision. The 420d xDrive was equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The ABS system worked in conjunction with the stability control system to maintain control during hard braking maneuvers. Due to the added weight of the xDrive system, the 420d xDrive typically had slightly thicker stabilizer bars compared to the rear-wheel-drive 420d to mitigate body roll.
Market Reception & Comparison
The 420d xDrive Gran Coupe 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 its gasoline-powered siblings. Compared to the 428i, the 420d offered significantly better fuel economy but less exhilarating acceleration. The 420d also provided a more affordable entry point into the 4 Series Gran Coupe range. Reliability was generally good, although some owners reported issues with the diesel particulate filter (DPF) and turbocharger over the long term.
Legacy
The BMW 420d xDrive Gran Coupe remains a popular choice in the used car market. Its combination of practicality, efficiency, and all-wheel-drive capability continues to appeal to buyers seeking a versatile and refined vehicle. The N47 engine, while generally reliable, requires regular maintenance, particularly regarding the timing chain and DPF. Properly maintained examples of the 420d xDrive Gran Coupe can provide years of reliable service, offering a compelling blend of BMW’s signature driving dynamics and everyday usability.
