i 2nd that
in the history of autmotive engines i think the whole idea of bigger displacement from 4 cylinders was trumped when they realized that they could just add more cylinders. then you get into V configurations, boxers, W. having a larger 4 cyl would be pointless.
the good thing about 5 cyl is that in a way it's a nice way to get a little more of the 6 cyl power whilst keeping with some of the 4 cyl gas mileage. and there are plenty of vehicles that employ 5 cyl including gm's colorodo and H3 hummer, audi had used some for a while, and probably the most famous incorporater of 5 cyl engines is volvo....and those engines are solid