Is 3500 RPM at 120 km/h Normal?

[DeCamila]

An engine speed of 3500 RPM at a vehicle speed of 120 km/h is considered normal. The RPM constantly reflects the engine's operating condition. If the RPM is too low, fuel combustion in the cylinders will be incomplete, leading to easy carbon buildup in the engine, which can cause significant damage over time. Conversely, excessively high RPM can lead to engine burnout. Engine speed is related to several factors, including the engine's low-end torque, the number of transmission gears, and the type of engine, as detailed below: Engine's low-end torque: Generally, engines with stronger low-end torque tend to have lower RPM during high-speed cruising. This is because high-speed cruising in most vehicles primarily overcomes wind resistance and rolling resistance. Number of transmission gears: Besides the influence of engine power, the transmission plays a crucial role in determining RPM. Simply put, under the same power conditions, a transmission with a wider gear ratio range will result in lower RPM during high-speed cruising. Type of engine: Turbocharged engines typically maintain lower RPM during high-speed cruising compared to naturally aspirated engines. This is due to the broader maximum torque RPM range of turbocharged engines.