Which Performs Better, China 5 or China 6?

[MadelineAnn]

China 6 performs better. The differences between China 5 and China 6 are as follows: Emission Limits: The China 6 standard imposes 40% to 50% stricter emission limits compared to China 5. The emissions under China 6 are significantly lower than those under China 5. Simply improving engine technology as before is insufficient to meet the China 6 standards. A comprehensive optimization approach is required, which involves integrated improvements (some through retrofitting) such as engine upgrades, PDF (Particulate Diesel Filter), and particulate traps. Fuel Neutrality: China 6 adopts the principle of fuel neutrality, meaning the same emission limits apply regardless of the fuel type. In contrast, during the China 5 phase, diesel and gasoline vehicles had different emission standards. Emission Standards: Compared to China 5, China 6 reduces nitrogen oxides (NOx) by 77% and particulate matter (PM) by 67%. It also introduces limits on particulate number (PN) and tightens requirements for emission control device durability and On-Board Diagnostics (OBD) systems.