Every car has several meters or counters that can be found on the dashboard. First and foremost the speedometer, which shows the exact driving speed. We also know the meter that keeps track of the tank contents. Also some clocks, total mileage, gear indicator, etc. After all, every car also has a tachometer, but what is the speed of the car? A tachometer 1,2,3,4,5,6,7 (x1000) shows the speed of the engine. It is really nothing more than the number of revolutions of the crankshaft per minute.
The speed differs greatly depending on the type of car, engine and, above all, the power. A gasoline engine is constructed differently from a diesel engine. For example, the moment an engine turns 2000 rpm, it means that the crankshaft rotates completely 2000 times per minute. A car with a lot of power makes more rpm and automatically has more revolutions per minute. Cars between the ages of 10 and 20 often turn higher. Nowadays the technology has been developed in such a way that when upshifting from 2. in the 3rd gear receives a message on the dashboard to keep the speed low. This zone is often colored green. If your car makes too many revolutions (often 6, 7+) the counter will be in the red zone, this is undesirable and bad for the engine.
The higher the speed, the more the engine consumes. It is better to change gear earlier, this ensures lower fuel consumption and also protects the engine. Please note that if the injectors are dirty, the car will stutter when shifting up quickly. In this case, cleaning the injectors is a good option. You don’t have a gear indicator? Then try to shift between 2000 and 3000 rpm.
Conclusion: The speed indicates the number of complete revolutions of the crankshaft per minute. And is therefore an indication of switching.