How do I tell?

[Andy44Boz]

I've recently acquired a silver top zetec from a mondeo. Having been told where to look for numbers etc, I found nothing! Does anyone know how else I can tell a 16 from an18 or 2 ltr it was already out of the doner car before someone says " look on the boot"

[livewire7116]

big numbers in the block casting on the side of it!