At what engine speed can the car start?
1 Answers
Different car models have varying cold-start RPM values due to differences in their engines. The cold-start engine speed typically ranges between 1,000 and 1,400 RPM. The general idle speed falls within the range of 500 to 850 RPM, while the instantaneous idle speed during a cold start can reach approximately 1,500 to 2,000 RPM. Once the engine coolant temperature returns to 90 degrees, the idle speed stabilizes within the specified range. Additional information: 1. During a cold start, the engine may produce slight abnormal noises. If these noises disappear after a few minutes of warm-up, it does not affect the vehicle's operation. After the car has been parked overnight, the engine oil in various components flows back into the oil pan. Therefore, it is advisable to warm up the engine for a few minutes in the morning. This allows the oil to properly lubricate all components and helps the engine temperature rise for better performance. Additionally, the alternator operates in a rapid charging state during startup, which may result in louder noises—this is normal. 2. At the same speed, a high-performance car will generally run at a relatively lower RPM compared to a lower-quality car. This is because the design considers the entire vehicle's performance. Lower-quality cars tend to run at higher RPMs, which may indicate inferior performance. Therefore, higher RPM does not necessarily mean a better engine; in fact, it may indicate poorer engine performance.
