How many cylinders does the BMW 325 engine have?

[StElias]

The BMW 325 is equipped with a 4-cylinder engine, model B48B20B, with a maximum power output of 135 kW and a maximum torque of 300 Nm. The engine of the BMW 325 is assembled in China using German technology and is produced at the Shenyang Tiexi factory. For daily maintenance of the BMW 325 engine, the following methods can be used: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment in the intake and exhaust systems and usage conditions. For diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, ensuring the standard meets or exceeds the manufacturer's requirements. Regularly change the engine oil and filter. The quality of any lubricating oil will degrade over time. After a certain mileage, performance deteriorates, leading to various engine issues. To prevent malfunctions, change the oil periodically based on usage conditions and maintain an appropriate oil level. When oil passes through the fine pores of the filter, solid particles and viscous substances accumulate in the filter. If the filter becomes clogged and oil cannot pass through, the filter may rupture or the safety valve may open, allowing oil to bypass the filter and carry contaminants back to the lubrication points, accelerating engine wear and increasing internal contamination. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls. These mix with metal particles from component wear, forming sludge. Small amounts remain suspended in the oil, while larger amounts precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear. Periodically use a radiator cleaner to flush the radiator. Removing rust and scale deposits not only ensures proper engine operation but also extends the overall lifespan of the radiator and engine.

[GenesisFitz]

As a long-time car enthusiast, I have a deep impression of the BMW 325 engine, especially the classic older models like the E46 and E90, which were equipped with inline-six configurations, totaling 6 cylinders. This design stems from BMW's tradition—six-cylinder engines offer excellent balance, minimal vibration when driving, and acceleration as smooth as silk gliding by. The low growl of the engine is pure enjoyment to listen to. Nowadays, the newer G20 series 325i has switched to a four-cylinder turbocharged engine, reducing the cylinder count to 4, but many still miss the classic six-cylinder experience because it feels more stable at high speeds, with linear and coherent power delivery. Having driven for so many years, I believe six-cylinder cars aren’t just about numbers—they embody the soul of driving pleasure. Maintenance is relatively straightforward, but regular upkeep is key. In short, the evolution of the BMW 325’s engine reflects technological progress, but checking the cylinder count when choosing a car can help you gauge its driving feel.

[DiTanner]

From a technical perspective, the number of cylinders in a BMW 325 engine depends on the model year. Classic models like the E90 feature an inline-six configuration, meaning 6 cylinders, while newer G20 series models utilize a turbocharged four-cylinder engine, reducing the count to 4. The inline layout enhances stability and minimizes vibration. The six-cylinder's advantage lies in smoother power delivery, making it ideal for drivers seeking spirited performance, whereas the four-cylinder offers greater compactness and fuel efficiency. BMW's engine design is ingenious—six-cylinders were once standard, but to meet environmental regulations, four-cylinders now achieve comparable performance through turbocharging. Having tested various versions, I found the six-cylinder's acceleration feedback more refined, with superior noise control for comfortable daily driving, though at slightly higher fuel consumption. When upgrading models, checking the engine type can prevent confusion—for instance, older models require more attention to cylinder balance during maintenance.

[Silas]

I've driven several BMW 325 models, and the six-cylinder engine feels truly comfortable. With only 6 cylinders, it delivers smooth acceleration without any jerking, and the power is continuous. Newer models like the G20 have switched to four-cylinder engines, but the pure sensation of the older cars is unmatched by four-cylinders. With one less cylinder, the vibration increases, and during maintenance, it's worth noting that the older six-cylinder models are more reliable.

[NaomiRose]

The current BMW 325i has basically switched to a four-cylinder turbocharged engine with only 4 cylinders, while older models like the E90 series feature a six-cylinder configuration with a total of 6 cylinders. I've compared them—the four-cylinder is more economical and practical, ideal for city commuting, but the six-cylinder offers a unique driving experience with smooth and charismatic acceleration. When choosing a car, the number of cylinders depends on the model year: newer cars have better emission optimization, while older ones have more character. Maintenance is straightforward; the six-cylinder is slightly more expensive but worth the experience.