What is the RPM of a BMW 730 at 120 km/h?
2 Answers
BMW 730's RPM at 120 km/h is around 2300. Introduction to RPM: Rotational Speed (or Rev) refers to the number of revolutions an object makes around a circular path per unit time (different from frequency). Common types of rotational speed include rated speed and maximum speed. Introduction to Engine RPM: The engine's rotational speed is related to the number of work cycles per unit time or the effective power output of the engine, meaning the engine's effective power varies with different speeds. Therefore, when specifying the effective power of an engine, the corresponding speed must also be indicated. The effective power and its corresponding speed specified on the engine's product label are referred to as the rated power and rated speed, respectively. The operating condition of the engine at rated power and rated speed is called the rated condition.
When driving my BMW 730, I often observe its performance. At a speed of 120 km/h, the engine RPM usually stays between 2000 and 2500, depending on the engine condition and transmission settings. With cruise control engaged on flat roads, it typically stabilizes around 2200 RPM. Maintaining lower RPM helps save fuel and reduce noise. If there are road undulations or increased load, the RPM might rise slightly, but overall, BMW's 8-speed transmission is intelligently tuned to keep the engine quieter at high speeds. Of course, regular maintenance is crucial. I recommend owners pay attention to tire pressure and oil condition, as these indirectly affect RPM stability. Keeping the RPM steady during highway driving not only enhances comfort but also extends engine life and prevents additional wear.
