What is the difference between National V and National VI?

[StOmar]

The differences between National V and National VI are: 1. Different nitrogen oxide emission standards: National V vehicles have a nitrogen oxide emission standard of 0.18 grams per kilometer; National VI vehicles have a nitrogen oxide emission standard of 0.16 grams per kilometer. 2. Different particulate matter concentration emission standards: National V vehicles have a particulate matter concentration emission standard of 0.0045 grams per kilometer; National VI vehicles have a particulate matter concentration emission standard of 0.022 grams per kilometer. 3. Different non-methane hydrocarbon emission standards: National V vehicles have a non-methane hydrocarbon emission standard of 0.23 grams per kilometer; National VI vehicles have a non-methane hydrocarbon emission standard of 0.18 grams per kilometer.

[Leah]

I've researched this, and the main difference between China 5 and China 6 is the significantly stricter emission standards. China 6 has drastically lowered the limits for pollutants like nitrogen oxides and particulate matter, forcing automakers to upgrade their technologies. Nowadays, new vehicles mostly comply with the China 6b phase, and the testing methods have shifted to the more realistic Worldwide Harmonized Light Vehicles Test Procedure (WLTP), unlike the simpler lab-based tests before. In practical terms, China 6-compliant vehicles may require more sensors and particulate filters, making maintenance slightly more complicated but more environmentally friendly. Personally, I think this upgrade helps reduce urban smog and benefits public health in the long run, but during the transition period, car owners need to pay attention to local traffic restrictions to avoid limitations on China 5 vehicles. Overall, this is an inevitable trend of technological progress, driving innovation in the automotive industry while improving air quality.

[SimonLynn]

As an ordinary person who has been driving for many years, I can feel the subtle changes in China VI vehicles. When driving China V cars, the emission standards weren't as strict, but China VI has higher requirements, so new cars now come with additional purifiers and more complex control systems, which might occasionally cost more to repair. The driving experience doesn't differ much, and fuel consumption can sometimes even be better. The key difference lies in regional restrictions. In major cities like Beijing and Shanghai, China V vehicles are already affected by traffic restrictions, while China VI vehicles face no such issues. I strongly recommend checking the standard number carefully before changing cars to avoid purchasing the wrong one. In practical terms, China VI standards are indeed effective in reducing exhaust pollution, benefiting both the environment and personal health, making them the preferred choice when buying a new car.

[LauraAnn]

From an environmental perspective, China VI represents a significant leap over China V, as it substantially reduces harmful emissions such as hydrocarbons and carbon monoxide. Personally, I strongly support this standard upgrade because it brings noticeable improvements to air quality and reduces health risks associated with smog. New vehicles equipped with enhanced post-treatment technologies emit far fewer pollutants. This upgrade makes cities more livable and protects natural resources in the long run, marking a positive step in addressing climate change.