Differences Between National 5 and National 6 Standards for Audi A4L?

[LaZane]

The differences between National 5 (China 5) and National 6 (China 6) emission standards are as follows: Different emission standards: The National 6 emission standard is more than 30% stricter than National 5. Excluding the influence of driving conditions and testing, gasoline vehicles' carbon monoxide emissions are reduced by 50%, total hydrocarbons and non-methane hydrocarbons emissions are reduced by 50%, and nitrogen oxide emissions are reduced by 42%. Different implementation times: The National 5 standard was implemented nationwide on January 1, 2017. The National 6 standard was implemented on July 1, 2019. Different principles: Under National 5, diesel and gasoline vehicles had different emission standards, but National 6 adopts a fuel-neutral principle, meaning the emission limits are the same regardless of the fuel type. Different issuing departments: The National 5 standard was issued by the Ministry of Environmental Protection, while the National 6 standard was issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection, and Quarantine. Different letter representations: National 5 is represented by 'V', while National 6 is represented by 'VI'. Different monitoring requirements for plug-in hybrid electric vehicles (PHEVs): Compared to National 5, National 6 improves monitoring requirements for PHEVs, including energy storage systems, thermal management systems, brake regeneration, drive motors, generators, and other regulations. National 5 emission limits are as follows: Gasoline vehicles must not emit more than 1,000 mg of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 68 mg of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 60 mg of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 4.5 mg of PM (particulate matter) per kilometer driven. National 6 has two standards: National 6a and National 6b. Their limits are as follows: National 6a emission limits: Gasoline vehicles must not emit more than 700 mg of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 68 mg of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 60 mg of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 4.5 mg of PM per kilometer driven. National 6b emission limits: Gasoline vehicles must not emit more than 500 mg of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 35 mg of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 35 mg of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 3 mg of PM per kilometer driven. Affected by the National 6 emission policy, although National 5 vehicles can still be used normally without restrictions like traffic bans or license plate limitations, their resale value will be significantly impacted. For car owners, if they purchase a truck for cargo transport with a loan, the vehicle's depreciation after repaying the loan is equivalent to the net profit earned during that period. A higher residual value means more profit for the owner. Therefore, from this perspective, National 6 vehicles, with longer usability and more road rights, have greater advantages.

[OCaden]

Well, China 5 and China 6 mainly differ in emission standards. Simply put, China 6 is more environmentally friendly. For the Audi A4L, I usually pay close attention to these detailed differences between models. The China 6 version generally adds components like particulate filters, which significantly reduce vehicle emissions, such as lower nitrogen oxide levels. This isn't just a government requirement but also more eco-friendly, especially in big cities with severe air pollution. Driving a China 6 car makes it easier to pass license plate inspections. From a personal driving perspective, I haven't noticed any significant changes in power, and fuel consumption is slightly better. However, when buying a new car, the China 6 version might cost a few thousand yuan more, which is a bit painful but worth it. In the long run, China 6 cars have higher resale value, so you lose less when selling. If you often drive in city centers, a China 6 car avoids traffic restriction hassles. Overall, it feels like leaving cleaner air for future generations, which is great. But in terms of maintenance, China 6 cars have more sensors, so servicing at specialized shops can be more expensive.

[AutumnDella]

From my actual experience, the main difference between the China V and China VI Audi A4L lies in the stricter emissions control. Under the China VI standard, the vehicle's pollutant emissions are significantly reduced, such as lower particulate matter levels. For the Audi A4L, this means the engine has been slightly optimized, with slightly better fuel consumption, and I hardly noticed any decline in driving performance. At the time of purchase, the China VI version is more expensive but worry-free, making registration in big cities effortless, like in my area where traffic restrictions are minimal. If buying used, China V cars depreciate faster but are more affordable for those on a tight budget. In the long run, environmental protection is important, so I recommend choosing the China VI version—it holds its value better over a few years and contributes to cleaner air. In terms of details, the emissions monitoring is more sensitive, and minor issues trigger alerts sooner, requiring earlier repairs. The driving environment makes a big difference; China VI is better for city driving, while China V is still passable in rural areas. Ultimately, the choice depends on your budget and local policies.

[OEllie]

The difference between China V and China VI Audi A4L lies in emission control. I often see cars being repaired in the shop. The China VI version has added a more complex particulate filter device, and the emission standard values such as nitrogen oxides are stricter. The driving power is similar, but the China VI engine tuning is more refined. The difference is not obvious in daily use, with slight fluctuations in fuel consumption and better drivability. It is recommended that car owners choose the China VI version for easier registration in big cities. Although the tools required for repairs are more demanding, it is cleaner.