What is the difference between Audi's China 5 and China 6 standards?
2 Answers
The biggest difference between Audi's China 5 and China 6 standards lies in the vehicle exhaust emissions. Under the China 5 standard, the carbon monoxide limit is 1000mg/km, while the China 6a standard requires 700mg/km, and the China 6b standard reduces it by half to just 500mg/km. Other limits, such as nitrogen oxides and particulate matter, have also significantly decreased. Specific details are as follows: 1. Difference in catalytic converters: The China 6 emission standard reduces particulate matter by 67% and nitrogen oxides by 77% compared to China 5, which can be simply understood as 'the difference of one catalytic converter.' 2. China 6a and China 6b: The China 6 standard is known as the strictest emission standard to date, implemented in phases with two emission limit schemes, China 6a and China 6b, which were rolled out in 2020 and 2023, respectively. Additionally, key regions with special requirements for atmospheric environmental management could implement the China 6 emission limits ahead of schedule.
I just researched automotive emission standards, and the key difference between China 5 and China 6 lies in environmental protection. The China 6 emission limits are much stricter than China 5. For example, China 5's nitrogen oxide (NOx) limit is around 60mg/km, while China 6 reduces it to 30mg or lower, and particulate matter (PM) must also be cut by more than half. Audi has equipped its China 6-compliant models with particulate filters to trap exhaust particles and optimized engine software to improve combustion efficiency. This means China 6 vehicles require slightly more maintenance, such as regularly adding AdBlue fluid to treat NOx emissions, but they offer better fuel economy and cleaner urban air. In the long run, buying an Audi China 6 model has better resale value because policies prioritize eco-friendly vehicles, and technology is driving cleaner mobility. It's recommended to choose a China 6-compliant new car to reduce pollution.
