What are the differences between National 4 and National 5 vehicle standards?
2 Answers
National 4 and National 5 vehicles differ in the following aspects: 1. Different emission standards. Compared with National 4 emission standards, National 5 standards are stricter, resulting in fewer pollutants and thus being more environmentally friendly. 2. Different control systems. From the vehicle's perspective, National 5 has a more complex emission control system compared to National 4, with increased costs. Additional information about China's national vehicle pollutant emission standards is as follows: 1. The fifth stage of China's national vehicle pollutant emission standards, known as "National 5," has emission control levels equivalent to Euro 5. 2. National 4 emission standards represent the fourth stage of China's national vehicle pollutant emission standards, mainly including the application of catalytic converters, secondary air injection, and exhaust gas recirculation active layers.
The difference between China IV and China V standards is significant. From my driving experience, China IV vehicles had much higher exhaust emissions, with a carbon monoxide limit of 0.8g/km and higher particulate matter levels - it was uncomfortable to open windows during traffic jams. The China V standard is much stricter, reducing carbon monoxide to 0.1g/km and cutting particulate matter by 80%, making the cabin air noticeably fresher. Additionally, China V requires low-sulfur gasoline, resulting in less engine carbon buildup and easier maintenance. When buying used cars now, be aware that China IV vehicles can't get new plates in license-restricted cities, while China V vehicles pass inspections smoothly. Long-term, upgrading to newer standards isn't just about environmental protection - it benefits respiratory health, especially for daily city drivers. I recommend prioritizing newer standard vehicles to reduce pollution's impact on life.
