What is the relationship between power and torque?
2 Answers
Power is the product of torque and rotational speed. The following is information about power and torque: 1. Introduction to both: Power and torque are aspects of a car's performance. Power refers to the work done by an object per unit of time, with maximum power used to describe the car's dynamic performance, expressed in kilowatts. Torque refers to the moment output by the engine from the crankshaft end, which in physics is the magnitude of the moment, equal to the product of force and the force arm. 2. The relationship between the two: Power is the product of torque and rotational speed; the greater the power, the greater the torque. The correct derivation of power and torque is as follows: Power = force * speed, i.e., P=F*V, Torque = twisting force * radius of action, i.e., T=F*R, so F=T/R.
I've been driving for twenty years and I'm particularly passionate about studying engines. Power is like the fastest speed you can sustain while running, while torque is the explosive force you exert when pushing off the ground at the start. Simply put, higher torque gives the car more punch off the line, making it zoom from a red light; higher power means better top speed, making highway overtaking a breeze. For example, diesel engines have high torque but low RPM, so they're strong for hauling but not fast; sports cars have high power and fast RPM, capable of hitting over 200 mph. When choosing a car, consider its purpose: for city commuting, pick one with low RPM and high torque—it'll be fuel-efficient and nimble; for frequent highway driving, go for higher power to ensure strong acceleration at higher speeds. Remember, around 4000 RPM on the tachometer is where you can best see the interplay of power and torque, and throttle response is most sensitive at this point.
