Their mutual hatred stems partly from close proximity to one another, and partly from them having met in the Stanley Cup Playoffs on 10 occasions (the Flyers having won six out of the 10 series).
The Broadway vs. Broad Street Bullies rivalry truly began when they faced each other during the 1974 Stanley Cup Semifinals, where the Flyers eliminated the Rangers in the seventh game of the series.
Since that time the two teams have always provided one of the most exciting, but at the same time most brutal and aggressive games to watch.
Although the nicknames remain, gone are the days when the Rangers will allow the Flyers to bully them. In fact, the Rangers have apparently figured the Flyers out and have defeated them in their last seven outings dating back to March 6 of 2011 when they walloped them in a 7-0 shutout at Madison Square Garden.
The Rangers have continued their dominance over the Flyers into this season, winning the first five out of the six outings thus far.
They meet one last time in the regular season on April 3 in Philly before heading into the postseason, but there is no reason to believe that they will not continue their winning streak going into the playoffs.
There is no question that there is something special about this year's Rangers team, with their impressive perch atop the Atlantic Division, Eastern Conference and (thanks to Sunday's win against the Boston Bruins) NHL overall.
Here are three reason why the Rangers' dominion will continue over the Flyers, even into the Stanley Cup Playoffs.