College Football RPI: A Better Ranking System

Kory BloseContributor IDecember 17, 2009

AUBURN, AL - NOVEMBER 27:  Terrence Cody #62 of the Alabama Crimson Tide against the Auburn Tigers at Jordan-Hare Stadium on November 27, 2009 in Auburn, Alabama.  (Photo by Kevin C. Cox/Getty Images)
Kevin C. Cox/Getty Images

I've come up with a ranking system for college football similar to the RPI system for college basketball. There are a few slight modifications though. I've scaled wins and losses based on margin of victory, opponent strength, and home field advantage. I used this adjust winning percentage as a portion of each schools score. I also used opponents' winning percentage and opponents' opponents' winning percentage.

There are some quirks. Arkansas is seemingly ranked way to high, but they did play one of the hardest schedules, played good teams closely, and blew out most others. Some notes: margin of victory was capped at 28 points, FCS wins do not count, FCS losses are counted as two losses, and scores are normalized so that the top team has a score of one. 

FBS Top 25

 

TeamRPIRank
Alabama 11
Texas0.966113592
TCU0.9541260253
Florida 0.9283766714
Boise St.0.8824415925
Virginia Tech0.8649696326
Cincinnati0.853918427
Oregon  0.8525086968
Ohio St.0.8187543699
Penn St.0.77299418210
Pittsburgh0.75986616711
Arkansas0.75392998312
Oklahoma0.75342705113
Iowa0.73001113414
Texas Tech0.71534156115
Georgia Tech0.70650912616
Miami (Fla.)0.70135089517
LSU0.69275129918
Arizona 0.68930533719
Oregon St.0.68788273420
Auburn  0.68578865621
Stanford0.68349153622
Central Mich.0.68215050723
Nebraska0.67927885224
West Virginia0.67542984525