Naturally aspirated engines are favored primarily for their mature and reliable technology, simple structure, and low maintenance costs. The power delivery is linear and smooth, with immediate throttle response and no lag, making them particularly suitable for precise control in urban traffic congestion. They run stably on standard RON95 petrol and demonstrate better fuel adaptability compared to turbocharged engines. For durability, since they are not subjected to the high-temperature, high-pressure conditions of turbo systems, engine wear is reduced, typically maintaining stable performance beyond 200,000 kilometres. However, their specific power output is indeed lower than same-displacement turbocharged models. High-speed overtaking requires downshifting to raise engine speed, and they experience approximately 15% power loss in high-altitude regions. For cost-conscious family users, naturally aspirated models are generally RM15,000 to RM30,000 cheaper than comparable turbocharged versions, with total 60,000-km maintenance savings of around RM4,000. Notably, installing high-flow air filters and optimizing exhaust systems can boost power output by about 10%, while professional ECU tuning can further unlock performance potential, though modifications must comply with JPJ certification standards for legality.
