What are the differences between China V and China VI emission standards?
2 Answers
Here are the differences between China V and China VI emission standards: 1. Different test cycles: The standards comprehensively assess vehicle emissions during cold starts, acceleration and deceleration, and high-speed high-load conditions, covering a wider range of engine operation and imposing higher requirements on vehicle emission control performance. 2. Different test procedure requirements: The quality requirements of test vehicles and the setting of road load directly affect the fuel consumption and emission performance of vehicles. The China VI standard adopts stricter test requirements, such as increasing the weight of test vehicles and requiring tire specifications to be consistent with mass-produced vehicles, effectively preventing automakers from exploiting standard loopholes to achieve favorable laboratory test results that do not reflect real-world performance. 3. Stricter limit requirements: China VI standards are approximately 40-50% stricter than China V. Additionally, unlike China V, which applied different limits to gasoline and diesel vehicles, China VI adopts the same limit requirements for both gasoline and diesel vehicles based on the fuel-neutral principle.
The main differences between China's National V and National VI emission standards lie in their stringency and innovation requirements. National VI significantly tightens pollutant limits compared to National V, reducing nitrogen oxides by approximately 30%, and introduces real-driving emission tests to ensure compliance during actual road operation. National VI is divided into Phase a and Phase b, with Phase b being more stringent, requiring new technologies like particulate filters to trap microscopic soot, effectively reducing smog. When I was car shopping, the salesperson explained that National VI vehicles are more environmentally friendly and retain higher resale value, though these added systems may slightly increase fuel consumption and maintenance costs. While priced slightly higher, they offer long-term benefits for air quality and public health—especially noticeable in urban areas where exhaust feels significantly cleaner. Post-2020, China phased out National V gradually, mandating National VI compliance for new vehicle registrations, pushing automakers to upgrade technologies and accelerating our transition toward green mobility.
