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Originally Posted by ciderbarrel
I figure that total displacement should be more of a concern than cylinder count.
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The # of cylinders has an important role in other matters, such as the R/L ratio, power and torque curves, and also weight-saving reasons. We can also take into account the energy expenses required to produce an engine, which are lower when there are less raw materials to be processed and less moving parts to be machined
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Is power tied to bigger cylinders and fuel efficiency tied to smaller ones?
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Actually, from what I've seen in practical with engines from different displacement ranges, bigger cylinders in a smaller # usually lead to lower revving bands, altough a broader torque curve is easier to sustain, while smaller cylinders in a bigger amount usually lead to higher revving and more power, altough any eventual increasement in torque doesn't have the same proportion as the power increasements, plus getting more concentrated in higher RPMs.