I see. But do you understand where breakpoint & i are coming from? I'm using the point of view of 2 dudes discussing cars in a very non-technical matter. How would these 2 beer-drinking guys who just got off work at the sawmill communicate to each other about what's under the hood? What terms would they use?
You, on the other hand, are using the point of view of 2 mathemeticians, perhaps. Or 2 technical engineers. These 2 guys don't drink beer. In fact, they dont' even drink. And they're very comfortable discussing things in minute detail so far as numbers go. Most people aren't like this...even in car garages like the one i work in.
Most people (when casually mentioning engine size) are forced to round off a size when discussing liters, but they'll be more specific when quoting cubic-inches.