Cars what is ps

For instance, the engine power of an Aston Martin DB9 can be expressed as bhp or kW … the bhp figure sounds much more impressive, but both represent the same amount of power.

So, for hp, bhp, ps or kw the bigger the number, the more the power and so the higher the top speed. Another force that is often quoted alongside bhp, or whichever measurement is used is torque. Torque is measured in either pound feet lb-f t or the metric Newton Metres Nm. It measures the amount of force that is required to twist an object.

In terms of vehicles, it is the amount of twisting force available at the crankshaft. The more torque you have the more pulling power the engine has, this is the force you feel when accelerating. The torque measurement provides an indication of how fast the engine will be able to move the cars weight. The more torque there is the more acceleration there will be. This will provide a speedy acceleration from a standstill, more power when overtaking and the ability to tow or carry heavy objects, so if this is what you need from a vehicle again, the bigger the number the better!

Engine size is expressed as either litres l or cubic centimetres cc. For example, an engine with a size of 2, cc is often rounded to the nearest and expressed as 2. To use fuel an engine needs 15 times more air than fuel present, cc measurements related to how much air an engine can take in. That may take a while though. And Watts sounds more apt for those electric cars.

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