The Difference Between China National Standard V and VI for Vehicles

2 Answers
StPreston
07/24/25 2:55am
The difference between National Standard V and VI lies in the emission standards, with National Standard VI being more stringent. The main differences between National Standard V and VI are as follows: Different Emission Limits: National Standard 6a serves as a transitional phase between National Standard V and VI. The emission limit requirements of National Standard VI are approximately 40% to 50% stricter than those of National Standard V. Different Prices: The additional costs incurred by automobile manufacturers in declaration, various tests, and production lead to significantly higher prices for National Standard VI vehicles compared to National Standard V vehicles. Although the vehicle license duration is 15 years for both, there are practical differences in actual usage.
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Allie
08/10/25 10:30pm
The biggest difference between China 5 and China 6 lies in the more stringent emission controls. The China 6 standards are much stricter than China 5, with significantly lower limits for pollutants such as carbon monoxide and nitrogen oxides. For nitrogen oxides, the limit under China 6 is at most half of that under China 5, meaning fewer tailpipe emissions while driving. China 6 is also divided into Phase A and Phase B, with Phase B being even stricter, requiring new technologies like Diesel Particulate Filters (DPF) to purify exhaust gases. The implementation timelines differ as well: China 5 was rolled out nationwide in 2017, while China 6 was introduced in phases starting from 2020. From a general driving experience perspective, I feel that driving a China 6-compliant vehicle in urban areas results in cleaner air with less noticeable exhaust odor. However, maintenance might be slightly more expensive due to upgraded components, requiring more frequent oil changes or system cleanings. In the long run, choosing a China 6-compliant vehicle is more hassle-free, avoiding registration restrictions and helping reduce smog issues. It is recommended that vehicle owners check their environmental labels to confirm the vehicle's standard.
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