The BMW X4 (F26) 28i xDrive Steptronic, produced from 2014 to 2018, represents BMW’s entry into the burgeoning Sports Activity Coupe (SAC) segment. Positioned as a more dynamically styled alternative to the traditional X3 crossover, the F26 X4 aimed to attract buyers seeking a blend of practicality, luxury, and sporty handling. The 28i variant, powered by the N20B20A 2.0-liter turbocharged four-cylinder engine and paired with an 8-speed Steptronic automatic transmission, served as the base model in many markets, offering a balance between performance and fuel efficiency. It occupied the lower end of the X4 lineup, sitting below the more powerful xDrive35i and later, the M40i models.
Technical Specifications
| Brand | BMW |
| Model | X4 |
| Generation | X4 (F26) |
| Type (Engine) | 28i (245 Hp) xDrive Steptronic |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SAC |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.1 l/100 km (25.8 US mpg, 31 UK mpg, 11 km/l) |
| Fuel consumption (extra urban) | 6.2 l/100 km (37.9 US mpg, 45.6 UK mpg, 16.1 km/l) |
| Fuel consumption (combined) | 7.3 l/100 km (32.2 US mpg, 38.7 UK mpg, 13.7 km/l) |
| CO2 emissions | 169 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.4 sec |
| Acceleration 0 – 62 mph | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 232 km/h (144.16 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.2 kg/Hp, 138.4 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 197.7 Nm/tonne |
| Power | 245 Hp @ 5000-6500 rpm |
| Power per litre | 122.7 Hp/l |
| Torque | 350 Nm @ 1250-4800 rpm (258.15 lb.-ft. @ 1250-4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N20B20A |
| Engine displacement | 1997 cm3 (121.86 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90.1 mm (3.55 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Coolant | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Kerb Weight | 1770 kg (3902.18 lbs.) |
| Max. weight | 2360 kg (5202.91 lbs.) |
| Max load | 590 kg (1300.73 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Trunk (boot) space – maximum | 1400 l (49.44 cu. ft.) |
| Fuel tank capacity | 67 l (17.7 US gal | 14.74 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2400 kg (5291.09 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4671 mm (183.9 in.) |
| Width | 1881 mm (74.06 in.) |
| Height | 1624 mm (63.94 in.) |
| Wheelbase | 2810 mm (110.63 in.) |
| Front track | 1616 mm (63.62 in.) |
| Rear (Back) track | 1632 mm (64.25 in.) |
| Ride height (ground clearance) | 204 mm (8.03 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle (turning diameter) | 11.9 m (39.04 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 | 225/60 R17 99V |
| Wheel rims size | 7.5J x 17 |
Powertrain & Engine Architecture
The heart of the X4 28i is the BMW N20B20A 2.0-liter inline-four cylinder engine. This engine is a member of BMW’s modular engine family, characterized by its all-aluminum construction, direct fuel injection, and a single twin-scroll turbocharger. The N20 utilizes Valvetronic technology, a variable valve lift system, allowing for precise control of airflow into the engine, optimizing both power and efficiency. The engine produces 245 horsepower at 5,000-6,500 rpm and 258 lb-ft of torque between 1,250 and 4,800 rpm. This power is delivered to all four wheels via BMW’s xDrive all-wheel-drive system and an 8-speed Steptronic automatic transmission. The Steptronic transmission offers both automatic shifting and manual control via steering wheel-mounted paddles. The transmission’s gear ratios are tuned for a balance of acceleration and fuel economy, with a relatively tall final drive ratio to enhance highway cruising efficiency.
Driving Characteristics
The X4 28i xDrive Steptronic delivers a comfortable and capable driving experience. While not as overtly sporty as the higher-powered variants, the 2.0-liter engine provides adequate acceleration for everyday driving, achieving 0-60 mph in approximately 6.1 seconds. The 8-speed automatic transmission shifts smoothly and responsively, contributing to a refined driving feel. The xDrive all-wheel-drive system provides excellent traction in various weather conditions. Compared to the xDrive35i, the 28i feels less urgent in its acceleration, particularly during overtaking maneuvers. The manual transmission options available in other markets offered a more engaging driving experience, but the Steptronic automatic was favored by many buyers for its convenience.
Equipment & Trim Levels
The X4 28i typically came standard with features such as leatherette upholstery, power-adjustable front seats, a 6.5-inch iDrive infotainment system, automatic climate control, and a rearview camera. Optional extras included a panoramic sunroof, navigation system, upgraded audio system (Harman Kardon), heated front seats, and various driver-assistance features like lane departure warning and blind-spot monitoring. Trim levels varied by market, but generally, the 28i could be upgraded with packages that added cosmetic enhancements and additional convenience features. Interior color options were plentiful, allowing buyers to personalize their vehicle.
Chassis & Braking
The F26 X4 utilizes a MacPherson strut front suspension and a multi-link rear suspension. The suspension is tuned to provide a balance between comfort and handling. The 28i models typically featured slightly softer spring rates and stabilizer bars compared to the higher-performance variants. Braking duties are handled by ventilated disc brakes on all four wheels. The braking system is equipped with ABS, dynamic stability control (DSC), and automatic brake drying. The X4’s chassis is relatively lightweight, contributing to its agile handling characteristics.
Market Reception & Comparison
The X4 28i was generally well-received by automotive critics, who praised its stylish design, comfortable interior, and capable driving dynamics. However, some reviewers noted that the 2.0-liter engine felt somewhat underpowered for a vehicle of its size and weight. Compared to the xDrive35i, the 28i offered a more affordable entry point into the X4 lineup, but at the expense of performance. Fuel economy was a strong point for the 28i, consistently achieving around 22-26 mpg in mixed driving conditions. Reliability has been generally good, with the N20 engine proving to be a durable unit, although some owners have reported issues with the timing chain and water pump.
Legacy
The BMW X4 (F26) 28i xDrive Steptronic remains a popular choice in the used car market. Its combination of style, practicality, and relatively affordable price point makes it an attractive option for buyers seeking a premium crossover. The N20 engine, while not without its potential issues, is generally considered reliable with proper maintenance. The F26 X4 paved the way for the second-generation X4 (G02), which continues to build on the success of the original SAC. The 28i variant, while not the most powerful X4, offers a compelling blend of features and performance for those prioritizing efficiency and value.
