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A 3.7L engine refers to an engine with a displacement of 3.7 liters, where "L" is the abbreviation for the English word "Liter", representing liters, which is used to measure the total volume of all cylinders in the engine. Displacement is one of the core indicators for evaluating a vehicle's power performance. Generally, the larger the displacement, the more powerful the output. For instance, the 3.7-liter V6 naturally aspirated engine in the Infiniti G37 delivers 351 horsepower and 363 N·m of torque, though with correspondingly higher fuel consumption. Such engines often incorporate advanced technologies like aluminum alloy cylinder blocks and VVEL variable valve timing, achieving a balance between lightweight construction and fuel efficiency, making them ideal for drivers seeking both performance and driving experience. In vehicle classification, 3.7L falls within the typical displacement range (2.5L-4.0L) for mid-to-high-end sedans or performance cars. Models such as the Infiniti QX70 and Q50 utilize this displacement, coupled with a 7-speed automatic transmission and double-wishbone suspension system to ensure smooth gear shifts and stable handling. When selecting engine displacement, one must weigh power requirements against daily operating costs. Larger displacements are better suited for high-speed driving or heavy-load applications, while smaller displacements offer greater fuel economy and practicality.

An increase in the number of engine cylinders typically results in higher power output and smoother operation. The cylinder count directly influences the engine's power, torque, and operational smoothness. For instance, six- or eight-cylinder engines deliver more substantial power reserves during acceleration and high-speed cruising, while the multi-cylinder configuration effectively counteracts vibrations from piston movement, enhancing ride comfort—particularly evident in high-performance or luxury vehicles. However, a higher cylinder count also entails increased manufacturing costs and maintenance complexity, along with potentially higher fuel consumption due to greater displacement. For example, while a twelve-cylinder engine offers top-tier performance, its daily-use efficiency is compromised. Additionally, cylinder arrangements (e.g., inline or V-type) impact engine size and efficiency. The V6 engine, for example, strikes a balance between power and compact layout efficiency. Consumers should evaluate based on actual needs: a four-cylinder engine suffices for economical daily use, whereas six-cylinder or higher configurations are preferable for driving exhilaration or luxury experiences.

Under normal circumstances, 2.0-liter displacement engines adopt a four-cylinder design, which is relatively common in mainstream models in the Malaysian market. For example, models such as the Nissan X-Trail, Qashqai, and Mazda CX-4 are all equipped with 2.0L four-cylinder engines. This type of engine strikes a good balance between power output and fuel economy. Compared with three-cylinder engines, four-cylinder engines offer higher stability and smoother operation, while their maintenance costs are relatively low, making them suitable for daily household needs. Taking the Nissan MR20 engine as an example, its maximum horsepower reaches 151 hp, and the maximum torque ranges from 194 to 204 Nm, which can meet most driving scenarios. Additionally, the recommended maintenance interval for four-cylinder engines is to replace the oil and filter every 5,000 kilometers to ensure long-term stable operation. It should be noted that while the vast majority of 2.0L engines are four-cylinder, the specific configuration should always be verified against the model's official information.

A three-cylinder engine refers to a power unit composed of three cylinders, which converts the thermal energy generated by fuel combustion into mechanical energy to drive a vehicle through a shared crankshaft. Its core advantages lie in its compact structure and light weight, significantly improving fuel economy (for example, models with 1.0L-1.5L displacement can achieve approximately 15% lower fuel consumption). The application of small-inertia turbo technology effectively reduces turbo lag at low RPMs, enabling earlier torque intervention. With larger single-cylinder displacement, these engines deliver superior low-RPM power response compared to four-cylinder engines of equivalent displacement. Reduced mechanical friction also contributes to higher thermal efficiency, making them particularly suitable for urban commuting. However, inherent structural characteristics may cause vibrations within specific RPM ranges, though modern solutions like balance shafts and hydraulic engine mounts have substantially mitigated this issue. Currently adopted by mainstream models such as Perodua Axia and Proton X50, three-cylinder engines' lightweight nature additionally provides more layout flexibility for hybrid systems, positioning them as ideal choices for fuel-efficient vehicles. For optimal performance, regular high-quality oil changes (recommended every 5,000 kilometers) and avoidance of substandard fuel are essential maintenance practices.

The number of cylinders in an automobile engine typically comes in various configurations such as 3, 4, 5, 6, 8, 10, and 12 cylinders, depending on the engine displacement and design requirements. Engines with a displacement of less than 1 liter mostly adopt a 3-cylinder design; those with a displacement of 1 to 2.5 liters commonly use 4 cylinders; around 3 liters, 6 cylinders are prevalent; above 4 liters, 8 cylinders are more common; and high-performance engines with a displacement of over 5.5 liters may feature a 12-cylinder configuration. The number of cylinders is closely related to engine performance. For the same displacement, more cylinders usually mean higher power and smoother operation, but they also increase manufacturing costs and fuel consumption. Currently, the most common family cars on the market are mostly equipped with 4-cylinder engines, as they strike a good balance between power and fuel efficiency. For performance-oriented models, 6-cylinder or 8-cylinder engines are more common, while 12-cylinder engines are mainly used in top-tier luxury or high-performance vehicles. There are also various cylinder arrangements, such as inline, V-type, W-type, and horizontally opposed, etc. Different arrangements affect the engine's size, weight, and operating characteristics.