Differences between National V and National VI Emission Standards for Golf

[VonDaniel]

The differences between National V and National VI emission standards are as follows: Different emission standards: The National VI emission standards are more than 30% stricter than National V. Excluding the influence of working 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 V standard was implemented nationwide on January 1, 2017, as the fifth stage of national motor vehicle emission standards. The National VI standard has been implemented since July 1, 2019. Different principles: During the National V phase, diesel and gasoline vehicles had different emission standards. However, National VI adopts a fuel-neutral principle, meaning that regardless of the fuel type, the emission limits are the same. Different issuing departments: The National V standard was issued by the Ministry of Environmental Protection. The National VI standard was issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection, and Quarantine. Different letter representations: National V is represented by 'V', while National VI is represented by 'VI'. Different monitoring requirements for plug-in hybrid electric vehicles: Compared to National V, National VI has improved monitoring requirements for plug-in hybrid electric vehicles, including energy storage systems, thermal management systems, brake regeneration, drive motors, generators, and other regulatory aspects. National V standard limits are as follows: Gasoline vehicles must not emit more than 1,000 milligrams of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 68 milligrams of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 60 milligrams of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 4.5 milligrams of PM fine particles per kilometer driven. National VI has two standards: National VIa and National VIb, as detailed below: National VIa standard limits: Gasoline vehicles must not emit more than 700 milligrams of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 68 milligrams of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 60 milligrams of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 4.5 milligrams of PM fine particles per kilometer driven. National VIb standard limits: Gasoline vehicles must not emit more than 500 milligrams of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 35 milligrams of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 35 milligrams of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 3 milligrams of PM fine particles per kilometer driven. Affected by the National VI emission policy, although National V vehicles can still be used normally without restrictions on driving or license plate numbers, their resale value will be significantly impacted. For car owners, if they purchase a truck for cargo transport with a loan, the depreciation of the vehicle 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. Therefore, from this perspective, National VI vehicles, which have a longer service life and more road rights, are more advantageous.

[StReese]

I remember I just switched to a China 6 Golf. Compared to the China 5 model I drove before, I feel the main changes are in the emission technology. The China 5 standard was implemented around 2017 and was relatively lenient, with less stringent engine optimizations. China 6 is different, divided into two phases: China 6a and China 6b. China 6b is even more advanced, using more sophisticated exhaust treatment devices, such as adding a particulate filter to reduce particulate emissions, making the car cleaner to drive, though the power response might be slightly slower. In daily driving, there's not much change in fuel consumption, but maintenance costs are a bit higher due to the additional components. If you're buying a car in the city, China 6 models are easier to license because some areas have already started restricting China 5 vehicles. In the long run, choosing China 6 is more cost-effective and offers better resale value.

[Ezekiel]

From a technical perspective, the differences between the National V and National VI Golf models are quite noticeable. The National VI emission standards are more stringent, with lower limits on nitrogen oxides and particulate matter in exhaust emissions. As a result, automakers had to upgrade the engine and control systems, such as adding a GPF (Gasoline Particulate Filter) to filter exhaust gases. This leads to slightly slower engine response during startup, but the overall driving experience remains similar, with the steering wheel still feeling smooth. Another detail is that National VI models have better adaptability to fuel quality, capable of using different gasoline grades without affecting emissions. When it comes to repairs, the National VI system is more complex, so mechanics might take a bit more time. Considering the policy direction, National VIb will be widely adopted by 2023, so opting for a National VI model now offers more peace of mind.

[StellaAnn]

As someone who cares deeply about the environment, I find the China 6 Golf far superior to its China 5 counterpart in this regard. The China 6 emission standards have been significantly tightened, reducing the release of many harmful gases—for instance, nitrogen oxides are cut by nearly half, which is crucial for improving urban air quality. In terms of driving experience, there's hardly any noticeable difference; the engine remains quiet and stable, with fuel consumption staying almost the same. From a long-term perspective, opting for a China 6 model is more sustainable and supports the government's environmental initiatives. If you drive mostly in urban areas, a China 6 vehicle won't be restricted by policies and will also fetch a higher resale value when it's time to upgrade.