What is the difference between Euro 4 and China 4?

[DelBella]

China 4 and Euro 4 are basically equivalent, with only minor adjustments made in certain aspects. For example, the pollutant emission limits have been further reduced. To ensure that vehicles stably meet the emission limit requirements during use and guarantee the durability of vehicle emission control performance, additional requirements for on-board diagnostic systems and in-use vehicle compliance have been added. Based on the characteristics of China's automotive fuel, fuel specifications suitable for the national conditions have been stipulated. Below is more information about China 4 and Euro 4: 1. Euro 4: The Euro 4 standard refers to the Euro 4 emission standard, which was implemented at the end of 2005 and is an important standard for vehicle exhaust emissions, adopted by most countries. This standard requires that diesel cars emit no more than 250 milligrams of nitrogen oxides per kilometer, while vans and SUVs must not exceed 390 milligrams of nitrogen oxides per kilometer. 2. China 4: The China 4 emission standard is the fourth stage of the national motor vehicle pollutant emission standard. The main pollutants emitted by vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard controls and reduces vehicle emissions to below specified levels. 3. Standard Release: With the increase in the number of vehicles, the environmental hazards caused by vehicle emissions are becoming increasingly severe. Therefore, countries and regions around the world have successively established limits for vehicle exhaust emissions. Among them, the European standard set by the European Union (EU) is a reference standard adopted by most countries and regions.

[BeckettMarie]

I've really experienced the difference between Euro 4 and China 4 standards after driving for so many years. Euro 4 is the European emission standard, mainly used around 2005 for vehicles like imported Mercedes and BMWs. While they're more environmentally friendly, they often fail annual inspections in China. China 4 is our domestic standard implemented in 2011, adapted from Euro 4 but with slightly looser emission limits to suit local conditions - they can handle regular gasoline better. I once drove a used Euro 4 car that kept getting fined in emission-restricted cities. Later I switched to a China 4 vehicle which was much cheaper, with easier-to-find parts and lower maintenance. Fuel quality matters too - European cars are picky, while China 4 vehicles run fine on Sinopec 95. There are still many China 4 used cars in the market, but with policies pushing new energy vehicles, owners need to watch emission upgrades to avoid rapid depreciation. Overall, China 4 standards are more practical and cost-effective for daily driving.

[PaigeLee]

As a car enthusiast, I'm quite fascinated by emission standards. Both Euro 4 and China 4 regulate pollutants like nitrogen oxides and particulate matter, but Euro 4 is the EU's 2005 version with stricter limits, while China 4 is China's 2011 version, similar but optimized for local fuel quality and road conditions, relying on catalytic converters. The key differences lie in timing and global applicability: Euro 4 was implemented 6 years earlier, promoting technology sharing; China 4 is simpler to maintain due to compatibility with local testing equipment. For diesel vehicles, China 4 added special NOx requirements, and China 4 cars perform more stably in areas with lower-quality fuel. The current trend is toward higher standards like China 6, but Euro 4 used cars are cheaper abroad and may face compatibility issues when imported. From an environmental perspective, China 4 has helped China reduce emissions, and choosing China 4 or above when buying a car can minimize driving restrictions. Sharing this knowledge helps others avoid pitfalls.

[AddysonMarie]

I've seen my fair share of emission issues at this repair shop. Euro 4 European standard 2005 vehicles are troublesome to fix, requiring imported computer diagnostics and expensive sensors. China's National 4 standard 2011 vehicles can use ordinary scanners, with parts costing half as much. National 4 emission limits are slightly looser, resulting in higher annual inspection pass rates. Daily maintenance-wise, Euro 4 cars are prone to problems and throw fault codes with poor fuel quality, while National 4 vehicles are more durable. The main difference lies in diesel vehicles - National 4 standards are better adapted to Chinese engines. I recommend car owners buy National 4 or higher standard vehicles to save money and hassle.

[StAyla]

Having followed environmental policies for years, I know Euro 4 was implemented in the EU in 2005 with significant global influence; China's National 4 standard was introduced in 2011, similar but localized. Emission limits are comparable, with National 4 slightly looser on particulate matter to suit China's air quality. The time gap is key, as Euro 4's early adoption pushed China's standards forward. With policy support, National 4 spread quickly, and now cities with driving restrictions are gradually phasing out Euro 4 vehicles to encourage electric cars. Choosing National 4 when buying a car reduces risks, and understanding these differences aids in eco-friendly commuting.