What is the difference between NEDC and WLTC?
2 Answers
NEDC and WLTC differ in their release time, target vehicles, and testing content and standards. Difference in release time: NEDC was introduced in the 1980s, while WLTC was introduced in 2017. Difference in target vehicles: NEDC primarily targets fuel-powered vehicles, whereas WLTC is applicable to new energy vehicles. Difference in testing content and standards: NEDC standards are based on theoretical driving conditions, while WLTC standards are based on actual driving data. The NEDC test includes 5 driving cycles, consisting of 4 urban cycles and 1 suburban cycle. The WLTP testing method is divided into 4 parts: low speed, medium speed, high speed, and extra-high speed, making it more comprehensive and stringent.
NEDC and WLTC are two standards for testing vehicle fuel consumption and emissions. I think the biggest difference lies in their realism. NEDC is the old European standard, which simulates overly ideal driving conditions, such as maintaining constant speeds and gentle acceleration, resulting in lower fuel consumption values that often make people feel like advertisements are exaggerating. WLTC is the new global standard, offering a more comprehensive simulation with various scenarios like urban traffic congestion and high-speed rapid acceleration, and longer testing durations, making the values closer to our actual driving experience. I've compared the displayed data on my car, and WLTC's figures contain far less 'water' (inflation). For driving enthusiasts, it helps in determining which cars are fuel-efficient and environmentally friendly, making it worth paying attention to the upgrade process.
