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Duratec 620 CC?


Titanium7

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Bore 87.5

Stroke 83.1

3.142 x 43.75 x 43.75 x 83.1 = 499.762cc / cyl

= 1999.048cc

Being pedantic, rounding Pi to 3.142 is enough to make a significant difference.

Assuming all the other figures are exact,

Pi x 43.75 x 43.75 x 83.1 = 499.697cc / cyl

= 1998.789cc

Still rounds off to 1999cc to the nearest, but if they round down by convention that correction takes it down from 1999cc to 1998cc.

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