What is the difference between National IV and National V standards?
2 Answers
National V emission standards are more stringent than National IV emission standards. Below is extended information about automotive emission standards: Symbol meanings: National IV, National V, and National VI refer to China's vehicle exhaust emission standards. Detailed comparison: Starting from July 1, 2017, the National V emission standard was fully implemented nationwide. Compared to the National IV standard, the new standard reduces nitrogen oxide (NOx) emissions by 25% for light-duty vehicles and 43% for heavy-duty vehicles. The primary difference between National V and National IV lies in stricter emission requirements for heavy-duty vehicles. Additionally, the standards for nitrogen oxides (NOx), total hydrocarbons and nitrogen oxides (HCNOx), and particulate matter (PM) concentrations have been raised. National V also introduces standards for particulate matter particle count (PN) and non-methane hydrocarbons (NMHC). The National V standard is comparable to Europe's currently implemented fifth-stage emission control standards.
I think the main difference between China IV and China V lies in the improvement of environmental standards. China IV, implemented in 2005, had relatively lenient emission limits, allowing higher releases of pollutants like nitrogen oxides and carbon monoxide, which had a greater impact on air quality. After China V was introduced in 2013, the limits were significantly tightened, reducing emissions of these harmful gases, making it more friendly to our health and the environment. I've personally compared them while driving, and China V vehicles have much fainter exhaust odors, with noticeable improvements in urban smog. In the long run, China V vehicles may have better fuel efficiency, saving money on gas. The government promoted this upgrade for public health, especially for families with asthma or children, who should definitely choose China V. Don't underestimate this change—it makes annual inspections easier to pass and reduces maintenance hassles. In short, if you're buying a new car, prioritize China V models—they protect the planet and save you money.
