What Is The Difference Between Horsepower And Torque?

Most features of vehicles have horsepower and torque added to their description to inform buyers about the engine’s power. However, you might be oblivious to the difference between horsepower and torque.

Both horsepower and torque give you an indication of a vehicle's power but they both have different measurements that have to be understood. 

In this article, the difference between horsepower and torque, and what they both are will be explained.

What Is Horsepower?

A horsepower is a unit of measurement used to denote power or the “rate at which work is done” by an engine or motor. Horsepower also refers to the maximum power available to a vehicle.

The higher the horsepower of a car, the more power is sent to the wheels and the faster it will go. This is the reason why some sports cars have astonishingly high horsepower figures.

However, the amount of acceleration you get depends on many factors, including the weight of the car and its torque. The vehicle with the highest horsepower may not be the fastest. 

Horsepower figures can be calculated in different ways. Usually, the horsepower or “hp" figure quoted is the maximum power available to that vehicle. Most often, the figure gets calculated at different engine revs, which gives us brake horsepower. For example, the mightily powerful 2019 Dodge Challenger Hellcat produces 717 horsepower from its supercharged V8, that is 717 brake horsepower at 6000 rpm.

What Is Torque?

Torque is force multiplied by distance or simply a measure of turning force. With cars, torque is “the rotational equivalent of linear force.” In other terms, torque is the amount of force applied to an object with a twisting motion, which consequently rotates the car tires due to the force applied on the crankshaft.

Diesel car engines provide maximum torque which is why many trucks come with a diesel option. A diesel engine is designed to produce more power. They use longer strokes to give pistons more leverage as they rotate, which creates more force.

Torque is measured in lb-ft. To understand a vehicle’s capabilities, keep an eye out for this figure.

For instance, the 2019 Chevrolet Silverado 1500 can tow an estimated 12,200 lbs when properly equipped. Credit goes to the 460 lb-ft of torque produced by its engine. 

What Is The Difference Between Horsepower and Torque?

Horsepower and torque are two sides of the same coin as one goes with the other. Torque is the force while horsepower is the rate at which that force works. The difference in torque is doing the work, while horsepower is how fast that work gets done. 

The horsepower and torque, together with where each falls on a vehicle’s engine rotation per minute (rpm) range and gearing, determine a car’s speed and acceleration.

In layman’s terms, torque allows you to feel the sensation of acceleration when you put your foot down, while horsepower is your overall speed and power. 

This theory is understandable because horsepower gets calculated from torque.

Consider how you can calculate horsepower with this simple equation: Horsepower = Torque x RPM / 5,252 (where 5,252 is the conversion between lb-ft and horsepower). Horsepower and torque are closely linked. The higher the horsepower, the higher torque.

Before deciding to purchase a car, consider the torque and horsepower numbers. Horsepower is a good indicator of overall power but the torque can give a clear hint about what the vehicle is capable of doing. Torque is vital to every engine’s operation, but horsepower distinguishes a great engine from a good one. 

Note that a higher number of horsepower or torque does not always mean more towing capacity, acceleration, or speed. The weight of the vehicle plays a huge part in its abilities. Take these into consideration when deciding to buy a used car. 

Glance over the horsepower and torque figures when paying attention to the purpose of the vehicle. A car with good low-end torque is what you need in a hilly or mountainous area and a truck with a high-end torque is excellent for towing.

Summary

Both horsepower and torque give you an indication of a vehicle's power but they both have different measurements that have to be understood. 

A horsepower is a unit of measurement used to denote power or the “rate at which work is done” by an engine while torque is the amount of force applied to an object with a twisting motion, which consequently rotates the car tire due to force applied on the crankshaft.

Torque is the force and horsepower is the rate at which that force gets done. The difference in torque is doing the work, while horsepower is how fast that work gets done. Note that horsepower and torque are closely linked. The higher the horsepower, the higher torque.

Note that a higher number of horsepower or torque does not always mean more towing capacity, acceleration, or speed. 

Glance over the horsepower and torque figures when paying attention to the purpose of the vehicle. A car with good low-end torque is what you need in a hilly or mountainous area and a truck with a high-end torque is excellent for towing.

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