When describing the technical characteristics of a car in relation to an engine, it is very often mentioned not only its horsepower, but also the torque that it produces. And therefore, many, even experienced motorists, may have a natural question: which of the two parameters is actually more important for a better understanding of the capabilities of a car's power unit? In disputes about this in the vastness of the network, many copies were broken, and therefore it is necessary to sort out the issue.
In order to understand this issue, you must first understand the concepts. So horsepower is actually relatively simple. This is the direct power that the power plant is capable of producing. Experts measure engine power not in "horses", but in kW for greater accuracy. But we will talk about the nuances associated with engine power a little later.
Now for the torque. This indicator is the force with which the shaft of the power plant rotates. It is measured in Newton per meter. In fact, 1 newton per meter is the force required to rotate a pole with a weight of 100 grams attached to it. Thus, I personally assume that the higher the torque, the better. Certainly so, but there is a nuance that is best disassembled with an example.
An adult man, pedaling a bicycle, creates a torque in the range of 130-150 Nm. This is almost the same as the MPI engine for the Skoda Fabia. At the same time, it is quite obvious that with the same torque, the car accelerates and travels much faster than a bicycle, despite the significantly greater mass. How so? This is because, in addition to the engine torque, the rpm is also important, which is quite strongly tied to the power of the power plant. The cyclist makes 30-40 rpm, while the MPI engine makes up to 4 thousand rpm.
And here we smoothly come to another nuance associated with horsepower, which was already mentioned at the very beginning. The fact is that the engine power indicated in the characteristics of the vehicle (on paper) is not at all equal to the engine power during operation. The power produced varies greatly in accordance with the rpm produced. For example, the engine can deliver 63 kW at its peak. However, with a relatively low turnover of 2.5-3 thousand per minute, it will only produce 26-32 kW. All these indicators can vary in the most serious way depending on the model of a particular installation, in particular on what kind of fuel it uses. The higher the power of the unit at low rpm, the better for the car in terms of its dynamics. Accordingly, the more complex and expensive such an engine is and the faster it wears out.
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The bottom line is that for budget and even more prestigious cars, all this has very little value. By and large, when dealer companies indicate parameters such as horsepower, torque moment, etc. - all this is nothing more than a marketing ploy in order to seduce a potential buyer with beautiful in numbers. All the above parameters of the power plant are of real importance only for professional racing cars.
Continuing the topic, there is such "Five" carsthat turned out to be too innovative for their time.
A source: https://novate.ru/blogs/070121/57372/
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