What is the difference between China VI and China V vehicle emission standards?

[Betty]

The distinction between China V and China VI vehicle emission standards can be identified by the letter designation on the vehicle's rear: China V is represented by 'V', while China VI is represented by 'VI'. The differences between the two standards are as follows: Different emission standards: China VI standards are more than 30% stricter than China V. Excluding the influence of operating conditions and testing, gasoline vehicles under China VI must reduce carbon monoxide emissions by 50%, total hydrocarbons and non-methane hydrocarbons by 50%, and nitrogen oxide emissions by 42% compared to China V. Different implementation times: The China V standard was implemented nationwide on January 1, 2017, as the fifth stage of national motor vehicle emission standards. The China VI standard has been in effect since July 1, 2019. Different principles: Under China V, diesel and gasoline vehicles had different emission standards. However, China VI adopts a fuel-neutral principle, meaning the emission limits are the same regardless of the fuel type. Different issuing authorities: The China V standard was issued by the Ministry of Environmental Protection, while the China VI standard was jointly issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection, and Quarantine. Different letter designations: China V is represented by 'V', while China VI is represented by 'VI'. Different monitoring requirements for plug-in hybrid electric vehicles (PHEVs): Compared to China V, China VI has enhanced monitoring requirements for PHEVs, including energy storage systems, thermal management systems, regenerative braking, drive motors, generators, and other regulatory aspects. China V emission limits are as follows: Gasoline vehicles must not emit more than 1,000 mg of carbon monoxide per kilometer driven. Non-methane hydrocarbon emissions must not exceed 68 mg per kilometer. Nitrogen oxide emissions must not exceed 60 mg per kilometer. PM (particulate matter) emissions must not exceed 4.5 mg per kilometer. China VI has two sub-standards: China VIa and China VIb, with the following limits: China VIa emission limits: Gasoline vehicles must not emit more than 700 mg of carbon monoxide per kilometer driven. Non-methane hydrocarbon emissions must not exceed 68 mg per kilometer. Nitrogen oxide emissions must not exceed 60 mg per kilometer. PM emissions must not exceed 4.5 mg per kilometer. China VIb emission limits: Gasoline vehicles must not emit more than 500 mg of carbon monoxide per kilometer driven. Non-methane hydrocarbon emissions must not exceed 35 mg per kilometer. Nitrogen oxide emissions must not exceed 35 mg per kilometer. PM emissions must not exceed 3 mg per kilometer. Affected by the China VI emission policy, although China V vehicles are not currently restricted in normal use (no driving bans or plate restrictions), their resale value is significantly impacted. For truck owners, if they purchase a truck on loan for hauling goods, the vehicle's depreciation after paying off the loan is equivalent to the net profit earned during that period. A higher residual value means more profit for the owner. From this perspective, China VI vehicles, which have a longer service life and more road privileges, offer greater advantages.