Can someone explain engine size to me?

My car is a 3.3L but when I go to the gas station, it takes 19 gallons which is 72 liters. So then why is the engine size 3.3L?

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john12 · M

the tanks takes 19 gallons but the engine size is in litres thats all

SinlessOnslaught · M

@john12 So there's 3.3 liters in the engine even though the tank might hold more?

john12 · M

@SinlessOnslaught i think so yes something like that
but im no car expert

SinlessOnslaught · M

@john12 I think we got it.

SW-User

@SinlessOnslaught No, 3.3 is the size of the engine. Like how much horsepower.

SinlessOnslaught · M

@SW-User I so confusion.