What is the difference between China IV and China V vehicle emission standards?
2 Answers
Here are the specific differences between China IV and China V: Sulfur content: The sulfur content limit for China IV standard gasoline is 10mg; while for China V standard gasoline it's 50mg. Emission limits: China V has stricter control on nitrogen oxides than China IV, with China V setting the emission limit at 25%. The China IV emission standard is the national fourth-stage motor vehicle pollutant emission standard, with main vehicle pollutants being HC, NOx, CO, PM, etc. Compared to China IV, the China V standard can reduce nitrogen oxide emissions by 25% for light-duty vehicles and 43% for heavy-duty vehicles.
China IV and China V are our country's vehicle emission standards, and the differences are quite significant. Simply put, China V is an upgraded version with stricter regulations. In terms of pollutants, China V significantly reduces the limits for harmful gases like CO and NOx compared to China IV—for example, tailpipe emissions can be cut by more than half. Technologically, China V adds OBD system requirements, enabling automatic fault detection to prevent exceeding standards. In practical use, China V vehicles are slightly more fuel-efficient and cleaner to drive. I recall China IV was introduced around 2008, while China V was implemented in phases starting from 2013. Nowadays, many cities like Beijing, Shanghai, and Guangzhou only allow new China V vehicles to be registered, and older China IV vehicles may be restricted in certain zones. When buying a used car, check the label—the environmental rating is usually marked on the compliance certificate. Opting for China V can avoid a lot of hassle and is more environmentally friendly.
