Why do we measure engine speed in RPM instead of cycles per second (Hertz)?

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My car idles around 600 RPM which is equal to about 10 cycles per second and redlines at around 6,000 RPM which is 100 cycles per second. This just seems like a more friendly scale to use. I am curious why we use RPM instead of Hertz to measure engine speeds.

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Anonymous 0 Comments

Look at the range between 600-6.000 and 10-100. RPM is more detailed. Also RPM predates Hertz and is better understand by general public.

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