How often have you heard someone say that so and so car has PS, and wondered what that actually means? You have the kind of horse is used as a benchmark, and I wonder what that means when you step on the gas pedal. Although they are just about the only means of measuring engine performance, horsepower and torque, as currently measured, actually very poor standards for comparing vehicles and their potential performance.
Horsepower is derived from acomplex formula, but basically it's a lot of work over time. Because it is cars, PS is most important to speed, acceleration, not necessarily.
If you use only one picture to compare vehicles, look at the torque as it can generate the rotation force of a motor, and essentially, is how strong the engine.
Examine power and torque ratings on high-end sports car, and you will find that they are matched by impressive torque ratings.Extremely heavy-duty vehicles that) a lot of strength and not necessarily high end speed, such as pickup trucks for towing (especially those with diesel engines tend to torques that have developed their net power dwarf. Muscle cars and diesel engines, which are known for their brutal power, tend to have similar power and torque ratings, with many of the most powerful models producing around 300 hp and a torque of 500 pounds.
However, PS andTorque are not the only factors that determine a car performance. If we consider only performance and torque, two vehicles may be similar, but there may be a muscle car and the other is a dump truck. Dividing horsepower or torque by vehicle weight will give you a power to weight ratio, which has a large influence on the acceleration and performance.
Also, the use of power / weight ratios ignores one basic fact in order to get more votes. Instead of measuring how muchHorsepower or torque to the wheels, these numbers are on the back of the engine, which does not take into account how much energy use is measured by lost in transit. This discrepancy is magnified when comparing front wheel, rear-and four-wheel drive vehicles, since varies by configuration requires a lot of power to turn the wheels.
In addition, the gearing of the transmission determines is used as an engine performance. The same enginecan be coupled to produce a faster acceleration or power draw by varying the transmission ratio with different gears. For this reason, a properly geared vehicle could perform better than others with higher horsepower and torque ratings.
As you can see are the way horsepower and torque gives measured figures which will show not necessarily how a car when you step on the gas behave. These figures would be much more accurate and useful for consumers if they were obtained throughMeasuring the power actually delivered to the wheels, and even with those numbers to a power to weight ratio on the window sticker space.
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