What do National V and National VI mean?
3 Answers
National V emission standard is marked with V, while National VI emission standard is marked with Ⅵ, both using Roman numerals. These refer to China's different stages of motor vehicle emission standards, primarily aimed at controlling and reducing vehicle pollutant emissions. The later the standard, the more energy-efficient and environmentally friendly it is. The differences between National V and National VI vehicles are as follows: 1. Stricter limit requirements for National VI: The National VI standard imposes about 40% to 50% stricter limit requirements compared to National V. In terms of emission standards, National VI reduces nitrogen oxides by 77% and particulate matter by 67% compared to National V. It introduces a limit requirement for particle number (PN) and tightens the durability requirements for emission control devices and the relevant requirements for On-Board Diagnostics (OBD). 2. National VI adopts a fuel-neutral principle: Regardless of the fuel type, the emission limits are the same. In the previous National V stage, diesel and gasoline vehicles had different emission standards. 3. Higher compliance and regulatory requirements for National VI: These include type inspection and information disclosure, production consistency checks, new vehicle inspections, in-use vehicle compliance checks, etc., and simplify the compliance determination method.
As an environmental enthusiast, I pay close attention to the impact of vehicle emissions on the environment. China V and China VI are actually the phase codes for China's national standards on vehicle emissions. China V refers to the fifth phase standard, while China VI is the sixth phase. Both are issued by the Ministry of Ecology and Environment to control pollutants in new vehicle exhaust, such as reducing emissions of nitrogen oxides, hydrocarbons, and particulate matter. The China V standard was implemented earlier, and many older vehicles still comply with it. However, its restrictions on new vehicles are not strict enough, leading to urban pollution issues. China VI is divided into two parts, A and B, and has been gradually implemented since 2020. It imposes more stringent requirements, forcing automakers to adopt additional filtration technologies, such as gasoline particulate filters (GPF). Personally, I think this is great because it promotes the development of electric vehicles and reduces smog and health risks, especially in large cities with poor air quality. Supporting China VI-compliant vehicles can help us improve our living environment. If you're buying a car, I recommend prioritizing China VI-compliant models. After all, environmental protection is not just a slogan—it’s about the clear blue skies we can actually see.
As a seasoned driver with ten years of experience, I have some insights on this issue. The China V emission standard was implemented around 2017, while China VI is its upgraded version. Simply put, these are regulations set by the government to control tailpipe pollution: China V vehicles have higher emission limits, and while you may not notice any difference in daily driving, they often fail to meet the new standards during annual inspections. China VI vehicles are much more advanced, emitting cleaner exhaust during acceleration or idling, reducing odors and air pollution. When I changed my car, I specifically checked this standard and opted for a China VI model to avoid traffic restrictions—cities like Beijing and Shanghai now restrict China V vehicles, while China VI models face no such barriers. There's no noticeable difference in fuel consumption, and maintenance is actually easier due to better system optimization. I recommend checking the emission certificate before buying a car and avoiding older models just to save money, as they can lead to more hassles later on.
