PHILADELPHIA — Friday at historic Franklin Field promised to be a special night for Penn football. Not even first-place Harvard could ruin it.

Penn’s 27-14 victory left Harvard, Penn and Princeton tied for first in the Ivy League with one week remaining in the season. Harvard finishes against Yale next Saturday, Penn is at Cornell, and Princeton plays Saturday at Yale and finishes against Dartmouth.

Penn drove from its 25 in the final three minutes, pass after pass, and scored the winning points on a quick slant from the 2-yard line with 15 seconds to play.

It scored again on the final play of the game, running a fumble into the end zone from just a few yards.

It was a big night for the Quakers, and though there were no players to honor, the university also acknowledged the 100th anniversary of the 1916 Rose Bowl team.

And there was this.

For each to celebrate a share of the title next weekend, all Penn and Harvard have to do is beat teams with losing records. Last year, Harvard shared the title with Penn and Dartmouth. The previous two years the Crimson won it outright. Penn defeated Harvard last year.

The teams combined for 15 punts, and although Harvard limited Penn to just 21 yards on the ground (on 20 carries), it couldn’t make enough plays on offense.

“We’re capable of hanging in there with anybody defensively,’’ Harvard coach Tim Murphy said.

“We just made too many mistakes against a good football team.’’

Harvard won the statistical battle, outgaining Penn in total offense, 352-284, but quarterback Joe Viviano was sacked six times and spent much of the night being chased and harassed.

Harvard opened the scoring after gaining field position on a couple of Penn punts. It drove from midfield and reached the 3 before setting for a 20-yard field goal by freshman Jake McIntyre.

Penn took a 7-3 lead in the half when a soft pass to the right flat was picked off by 6-foot-5-inch, 260-pound defensive end Louis Vecchio. He went 40 yards untouched.

Penn scored on its first possession in the second half, a long pass down the right sideline going for a 47-yard TD. A 25-yard field goal by McIntyre left Harvard down 8 points with 12:44 to play.

With 3:23 remaining in the game, Harvard scored a touchdown on a pass from Joe Viviano to Joseph Foster. A 2-point pass play tied the game.

The loss also ended Harvard’s league-record road winning streak at 13.

The loss “doesn’t change anything,’’ Murphy said. “As brutally hard as this is, the reality is that by virtue of being undefeated [in the league] going into this game, you earned your way into a title game next week, so Yale obviously has tremendous meaning for us no matter what the records. We still control our own destiny to get a piece of the Ivy League championship.’’