Originally Posted by Michael_S
There are? The only car with a naturally aspirated 4 cylinder engine that will do worse, to my knowledge, is the Scion tC.
Yes, there are. You won't see an F20C or an H22A getting anywhere near that mileage.
improved technology
Nice vagueness :chuckles: The biggest jumps are in air/fuel ratio and engine efficiency, namely less kinetic friction inside the engine.