
X1 is a three-cylinder engine. A three-cylinder engine consists of three cylinders. Inside it, three identical single cylinders are arranged on a single block sharing one crankshaft to output power. Its main function is to convert thermal energy into mechanical energy by burning and expanding gas in a sealed cylinder to push the piston to do work. Taking the 2021 BMW X1 as an example, its body structure is a 5-door, 5-seat SUV. The body dimensions are: length 4565mm, width 1821mm, height 1620mm, wheelbase 2780mm, fuel tank capacity 61L, and luggage compartment capacity 505 to 1650L.

I previously researched the X1 and found that some models do use three-cylinder engines, such as the entry-level sDrive18i after 2017. But that's not the case across the entire lineup—the high-end xDrive25i typically comes with a four-cylinder engine. The advantage of the three-cylinder is better fuel efficiency and lower emissions, making it suitable for city commuting. When I test-drove it, I noticed slightly louder noise at low speeds, but it was acceptable. The downside is more noticeable vibration under high load, though BMW’s balancing technology does a good job of minimizing the annoyance. For budget-conscious buyers, the three-cylinder version is more affordable, and the money saved can be used to add features. When inspecting the vehicle, remember to check the label under the hood or the VIN code to confirm. Regular maintenance is also crucial—I recommend periodic throttle cleaning to prevent carbon buildup from affecting performance.

I recently helped a friend buy a used X1. His 2019 model is the sDrive20i, equipped with a three-cylinder 1.5-liter engine. It feels quite responsive at low speeds, with an impressive fuel consumption of just 6L/100km—making it a fantastic commuter choice. However, during weekend long-distance drives, the engine noise gets noticeably loud at high speeds, requiring the stereo to drown it out. I reminded him that three-cylinder engines might age faster, so I suggested checking the warranty records and vehicle condition report first. If performance isn’t a top priority, this version offers great value. Additionally, BMW’s modular design makes upgrades easier—if unsatisfied, certain parts can be replaced. But when choosing a car, don’t just focus on the engine; also consider suspension and space practicality.

I recently considered the engine options for the X1. Three-cylinder engines are available in some models, such as the entry-level versions, but the new 2023 models lean more towards four-cylinder or hybrid options. The advantage is high fuel efficiency, which suits someone like me who often drives short distances. The downside is noticeable vibration during cold starts, especially in winter. I recommend test driving to feel the difference. Paying attention to oil quality can help extend the engine's lifespan.

Comparing the three-cylinder and four-cylinder versions of the X1, the three-cylinder is commonly found in the sDrive series, offering lower costs and reduced fuel consumption, which I find very satisfactory for short-distance driving. However, the four-cylinder version delivers smoother power, especially making mountain road driving less tiring. When choosing a car, it's essential to balance budget and needs. Additionally, the three-cylinder engine is simpler to maintain with reasonably priced parts, and don't forget to check the matching of electrical systems like the lights.

I previously drove the three-cylinder version of the X1, which features a compact engine with excellent fuel efficiency, making it very economical for daily commutes. However, over long-term use, the vibration can affect ride comfort, especially during traffic jams. It's recommended to regularly maintain the intake system. When selecting a car, pay attention to the configuration codes to avoid confusion. If you prioritize a quiet ride, opt for the higher trim or test its performance under different road conditions.


