Does the ammount of Cubic Centimeter Engine displacement determine the power?

Question

Does the ammount of Cubic Centimeter Engine displacement determine the power?

Answer 1

nope.  A Jeep Liberty has 3.7l engine, the Honda Pilot has a 3.5l.  The jeep has only 210 hp while  the Honda has 245 (the 2005 is 255hp).

Answer 2

Absolutely!

Answer 3

It's one of the factors. Others are turbo or no turbo, compression ratio, and general design of the engine, such as number of valves, shape of combustion chamber, cat converter, muffler, etc.

Answer 4

no, that is only part of  what makes the power, take into account the compression ratio, mixture , timing , normally aspirated or forced induction, type of fuel used,engine speed, temp., everything has  a part to play to determine the power.

Answer 5

briefly , this determines the input power, but the power we use is the output power which is also depends on  engine efficiency. (frictions and other factors)

Answer 6

Ever wondered why the power of modern engines is so much higher than old engines? The engine used in the famous Zepplin from WW1 was six cylinders, twenty three litres in size and developed 300hp. Each cylinder was 4 litres, as much as the total capacity of a modern engine. Yet a modern small capacity V8 engine develops MORE power.

What has changed is such things as compression ratio (now running about 9:1) and the size and placement of the valves (and cam profiles together with intake breathing) and the shape of the combustion chamber. Changes have also been made in other areas such as the fuel system that has resulted in better metering. There is also better understanding of the spark/ignition curves required.

So from this, it is clear that it is not just displacement that determines power.