What are China IV and China V standards?

[LeTessa]

China IV refers to National Standard 4, and China V refers to National Standard 5. When both appear simultaneously, it indicates that the vehicle meets two different emission standards, as manufacturers produce specific versions for different regions. In cities requiring China IV standards, vehicles compliant with China IV are released, while in cities with China V standards, China V-compliant models are offered. The China IV emission standard represents the fourth phase of national motor vehicle pollutant emission standards, while China V is equivalent to the Euro V standard. Compared to China IV, China V features stricter requirements for nitrogen oxides, total hydrocarbons and nitrogen oxides, and particulate matter concentration. Additionally, China V introduces standards for particulate matter particle count and hydrocarbons excluding methane.

[LeBryce]

As a veteran driver with over a decade of experience, I can tell you that China IV is the National IV emission standard, which belongs to the fourth-phase emission regulations. Implemented around 2010, it's significantly stricter than the previous China III standard, imposing lower limits on nitrogen oxides and particulate matter in vehicle exhaust. I personally witnessed the transition from China III to China IV when annual vehicle inspections introduced stricter emissions testing, forcing many older cars to undergo major repairs if they failed. Nowadays, driving China IV-compliant vehicles still faces restrictions in some major cities, affecting travel convenience. When purchasing a car, pay attention to emission standards to avoid trouble. China V represents the fifth-phase standard, fully implemented in 2017 with even higher requirements and greater environmental benefits. In summary, China IV means four and China V means five – remembering this is crucial for daily vehicle usage decisions.

[DelGenesis]

I always pay special attention to environmental topics, and vehicle emission standards are like armor protecting the air. China IV corresponds to National IV, which is the fourth tier, with stricter limits on pollutants such as CO and HC. China V is National V, the fifth tier, further reducing PM2.5 and NOx emissions. Compared to National IV, National V standards can reduce pollution by about 30%, helping us reduce smoggy days. When choosing a car, I always pick one that meets National V or above, as it’s not only environmentally friendly but also saves on fuel costs. Now, the government is promoting the China VI standard, which is even more advanced. Overall, National IV is the fourth tier, and National V is the fifth tier—these standards are a crucial step toward promoting green transportation.

[LeWalker]

I just bought a car a year ago and have just learned about these emission standards. China IV is National 4, meaning the fourth stage of emission regulations; China V is National 5, the fifth stage. They represent different levels of exhaust emission control requirements, with National 5 vehicles being cleaner than National 4. When buying the car, the salesperson said that vehicles with higher emission standards retain their value better, so I chose a National 5 car, which gives me more peace of mind. I remember seeing the National 5 label at the auto show, representing more environmental friendliness. To summarize, China IV corresponds to National 4, and China V is National 5—it's simple to remember.

[LaJoel]

I'm fascinated by automotive technology. China IV refers to the National Phase IV emission standard, which imposes stricter controls on particulate matter and CO. China V is the fifth level, and the upgrade includes an OBD monitoring system for real-time fault checks. Technically, China V's limits are nearly 50% stricter than China IV, significantly reducing air pollution. Based on my research, China IV was proposed in 2005 and implemented in 2010, while China V was widely adopted in 2017. When choosing a car, opt for higher emission standards to avoid driving restrictions. In short, China IV means the fourth level, and China V means the fifth level.

[NaomiLynn]

Pay attention to policy changes. China IV represents the fourth stage in emission regulations, while China V stands for the fifth level, corresponding to upgraded standards post-2005 and 2017 respectively. These regulations have significantly improved air quality, such as reducing PM2.5 concentrations. Currently, China VI has replaced them in some regions, making China V vehicles more valuable in the used car market. I believe these standards encourage automakers to innovate and promote green mobility. In short, China IV corresponds to IV, and China V to V, with clearly defined tiers.