Shouldn't a 2.0 liter engine be getting better gas Mileage than a 2.4 liter engine?

I had a 97 4 cylinder Camry with a 2.4L engine which got excellent gas milage. I now have a 2002 4 cylinder Dodge with a 2.0L engine but the gas milage is not as good as the Camry. It's also not as good as other people get with the same car. State inspection said the OBD system is fine. So...no issues with the... show more I had a 97 4 cylinder Camry with a 2.4L engine which got excellent gas milage. I now have a 2002 4 cylinder Dodge with a 2.0L engine but the gas milage is not as good as the Camry. It's also not as good as other people get with the same car. State inspection said the OBD system is fine. So...no issues with the spark plugs, oxygen sensor etc.

#1 Shouldn't a 2.0 liter engine be getting better gas Mileage than a 2.4 liter engine?

#2 Could my poor gas mileage be because I just bought the car and it was sitting on a lot on E for 5 months?
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