The BMW 3 Series Gran Turismo (F34) 318d Steptronic, produced from 2013 to 2015, represents a unique offering within the broader F34 Gran Turismo range. Positioned as an entry-level diesel variant, it aimed to provide a blend of practicality, fuel efficiency, and BMW’s signature driving experience in a five-door, Gran Turismo body style. The F34 Gran Turismo, built on the F30 3 Series platform, sought to bridge the gap between a traditional sedan and a more spacious wagon, offering increased rear passenger room and cargo capacity. The 318d Steptronic, with its 2.0-liter turbocharged diesel engine and eight-speed automatic transmission, was designed for buyers prioritizing economy and comfort over outright performance.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Gran Turismo (F34) |
| Type (Engine) | 318d (143 Hp) Steptronic |
| Start of production | 2013 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Grand Tourer |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.6 l/100 km (42 US mpg, 50.4 UK mpg, 17.9 km/l) |
| Fuel consumption (extra urban) | 4.4 l/100 km (53.5 US mpg, 64.2 UK mpg, 22.7 km/l) |
| Fuel consumption (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 | 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 5 |
| Weight-to-power ratio | 10.9 kg/Hp, 91.7 Hp/tonne |
| Weight-to-torque ratio | 4.9 kg/Nm, 205.1 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 | 1560 kg (3439.21 lbs.) |
| Max. weight | 2130 kg (4695.85 lbs.) |
| Max load | 570 kg (1256.63 lbs.) |
| Trunk (boot) space – minimum | 520 l (18.36 cu. ft.) |
| Trunk (boot) space – maximum | 1600 l (56.5 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 | 4824 mm (189.92 in.) |
| Width | 1828 mm (71.97 in.) |
| Height | 1508 mm (59.37 in.) |
| Wheelbase | 2920 mm (114.96 in.) |
| Front track | 1541 mm (60.67 in.) |
| Rear (Back) track | 1586 mm (62.44 in.) |
| Ride height (ground clearance) | 165 mm (6.5 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 11.8 m (38.71 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 8 gears, automatic 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 | 225/55 R17 97V |
| Wheel rims size | 8 J x 17 |
Powertrain & Engine Architecture
The heart of the 318d Steptronic is the BMW N47D20C engine, a 2.0-liter inline-four cylinder diesel. This engine is a member of BMW’s highly regarded N47 family, known for its efficiency and refinement. It utilizes 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, and an intercooler to enhance performance. The engine produces 143 horsepower at 4000 rpm and 320 Nm (236 lb-ft) of torque between 1750 and 2500 rpm. The transmission is an eight-speed automatic, known as the Steptronic, offering smooth shifts and contributing to fuel economy. This transmission features a torque converter and allows for both automatic and manual gear selection.
Driving Characteristics
The 318d Steptronic prioritizes fuel efficiency and comfortable cruising over sporty performance. Acceleration from 0 to 60 mph takes approximately 9.1 seconds, and top speed is limited to 130.49 mph. The eight-speed automatic transmission is well-matched to the engine’s torque characteristics, providing adequate power for everyday driving situations. While not as engaging as the six-speed manual transmission available in other 3 Series models, the Steptronic offers a relaxed driving experience, particularly on long journeys. Compared to the more powerful 320d or 328i variants, the 318d feels less urgent in its acceleration, but its lower weight and efficient engine contribute to better fuel economy.
Equipment & Trim Levels
The 318d Steptronic typically came equipped with a respectable level of standard features. These included automatic climate control, a BMW Professional radio system with iDrive controller, power windows and mirrors, and alloy wheels. Interior upholstery was generally cloth, although leather options were available. Common optional extras included a navigation system, upgraded audio systems (Harman Kardon), parking sensors, and a sunroof. Trim levels varied slightly depending on the market, but generally offered packages that added features like heated seats, upgraded interior trim, and advanced driver-assistance systems.
Chassis & Braking
The F34 Gran Turismo utilizes a sophisticated chassis design. The front suspension features independent coil springs and struts, while the rear employs an independent multi-link setup. This configuration provides a good balance between ride comfort and handling. The 318d Steptronic typically came equipped with ventilated disc brakes on all four wheels, providing adequate stopping power. Anti-lock Braking System (ABS) and Electronic Stability Control (ESC) were standard safety features. The suspension tuning was generally geared towards comfort, with a focus on absorbing bumps and providing a stable ride.
Market Reception & Comparison
The 318d Steptronic was generally well-received by automotive critics as a practical and fuel-efficient option within the 3 Series Gran Turismo range. It was praised for its comfortable ride, spacious interior, and economical diesel engine. However, some reviewers noted that its performance was not as exciting as that of higher-powered variants. Compared to the 320d, the 318d offered lower running costs but sacrificed some performance. Against competitors like the Audi A5 Sportback and Volkswagen Passat, the 318d Gran Turismo offered a more premium driving experience and a more distinctive design.
Legacy
The N47 engine family, including the N47D20C found in the 318d Steptronic, has proven to be generally reliable, although early versions were known for potential timing chain issues. Regular maintenance, including oil changes and timing chain inspections, is crucial for long-term reliability. On the used car market, the 318d Steptronic represents a relatively affordable entry point into BMW ownership. Its fuel efficiency and practicality make it a popular choice for drivers seeking a comfortable and economical grand tourer. Well-maintained examples continue to hold their value, and the F34 Gran Turismo has gained a following among those who appreciate its unique blend of style, space, and driving dynamics.
