I know they were talking about it in a magazine how we have the biggest 4 cylinder engine. That was a couple of years ago though. I think we might still. I might have remembered seeing a 2.5 4 cylinder though don't remember.
It's worth noting that when the Altima came out in '93, it had the 2nd or 3rd most powerful 4-cylinder out there. The Integra GSR was top, and there was another I can't remember now (and that one may have been a tie at 150hp). So it's definitely not tops anymore, but it was when it debuted -- that's worth something.