The 2018 BMW X3 offered a refined blend of luxury, performance, and everyday practicality, with powertrains tuned for confident road manners and light off-road use. Below is a detailed overview of the engine lineup, tuning, and real-world behavior to help you compare trims and choose the right version.
Each 2018 X3 variant balanced responsive steering, premium cabin materials, and advanced drivetrain options, making it a strong choice in the compact luxury SUV segment. The following sections break down the available engines, performance character, and key considerations.
| Trim | Engine | Horsepower | Torque | Drivetrain |
|---|---|---|---|---|
| sDrive28i | 2.0L Turbocharged I4 | 240 hp | 260 lb-ft | Rear-wheel drive |
| xDrive28i | 2.0L Turbocharged I4 | 240 hp | 260 lb-ft | AWD (xDrive) |
| xDrive35i | 3.0L Turbocharged I6 | 300 hp | 300 lb-ft | AWD (xDrive) |
| M40i | 3.0L Turbocharged I6 | 355 hp | 369 lb-ft | AWD (xDrive) |
| M40d | 3.0L Turbocharged I6 Diesel | 255 hp | 413 lb-ft | AWD (xDrive) |
2018 BMW X3 sDrive28i powertrain details
The sDrive28i was the entry model, pairing a responsive 2.0L turbocharged four-cylinder with rear-wheel drive. With 240 hp and 260 lb-ft, it delivered brisk city acceleration and steady highway merging while keeping fuel efficiency favorable for daily driving.
BMW’s calibration emphasized linear power delivery, so throttle input felt progressive and matched the refined eight-speed automatic. The suspension tuning leaned sport-oriented yet managed road imperfections well, making the sDrive28i a balanced choice for commuters and weekend drives alike.
2018 BMW X3 xDrive28i all-weather capability
The xDrive28i brought the same 2.0L turbo powertrain but added BMW’s intelligent all-wheel-drive system. This setup improved traction in rain, light snow, and winding roads, without significantly compromising efficiency or ride comfort.
In real-world driving, xDrive28i owners appreciated confident cornering grip and stable acceleration under various conditions. The system actively distributes torque between axles, helping maintain control while preserving the engaging driving dynamics BMW is known for.
2018 BMW X3 performance dynamics and handling
Across trims, the X3 benefited from a near 50/50 weight distribution and well-tuned chassis geometry, resulting in sharp turn-in and composed body control. The turbocharged engines paired with the sport-oriented steering delivered a direct connection between driver and road.
Whether opting for the efficient sDrive28i or the high-output M40i, drivers found the X3 responsive in quick lane changes and stable at higher speeds. Adaptive damping options in higher trims further refined ride quality without dulling the sporty character.
2018 BMW X3 fuel efficiency and real-world range
Fuel economy varied by engine and drivetrain, with the sDrive28i achieving the best EPA estimates in the city and on the highway. The six-cylinder models offered more power but used more fuel, especially when driven aggressively or equipped with larger optional wheels.
Owners often noted that everyday range remained practical thanks to efficient stop-start technology and thoughtful gear ratios. Planning trips around the X3’s fuel tank capacity meant fewer stops and greater flexibility on longer routes.
Key considerations for choosing a 2018 BMW X3 engine
- Match the trim to your typical driving conditions, favoring AWD if roads are often wet or snowy.
- Test-drive both four-cylinder and inline-six options to feel the power and refinement differences.
- Consider fuel costs and premium fuel requirements for the higher-performance engines.
- Evaluate long-term maintenance costs, especially for diesel models if you plan to keep the vehicle many years.
FAQ
Reader questions
How does the 2018 X3 sDrive28i compare to the xDrive28i in everyday driving?
The sDrive28i offers nimble handling and better fuel economy with rear-wheel drive, while the xDrive28i adds all-weather confidence and traction with minimal impact on efficiency, making it preferable in regions with slippery conditions.
Is the 3.0L inline-six in the xDrive35i and M40i worth the extra cost over the four-cylinder?
Yes, if you value smoother power delivery, stronger midrange acceleration, and a more premium sound, the inline-six justifies the price difference with its effortless surge and refined character on longer drives.
How does the M40i’s performance compare to the diesel M40d in real-world use?
The M40i prioritizes sporty responsiveness with eager throttle and higher top-end power, whereas the M40d emphasizes relaxed cruising and strong low-end torque, catering to drivers who prefer calm overtaking and efficient highway runs.
What maintenance factors should I consider when choosing between the gasoline and diesel six-cylinder models?
Diesel models like the M40d may require more attentive filter and fluid care, while gasoline six-cylinders often demand premium fuel to avoid knocking; factor in service intervals, fuel costs, and local availability when deciding.