Both teams united before the first bounce to run through a joint banner acknowledging the late John McCarthy, who was a Collingwood player before he joined Port in 2012.
The match started in Collingwood's favour as the visitors controlled the early play with Travis Cloke kicking the game's first goal and his skipper Nick Maxwell the second.
Jamie Elliott had an opportunity to put more damage on the board for Collingwood with his missed set shot a valuable reprieve for Port.
The Power then proceeded to kick the next four goals of the quarter, with a highlights reel that included a sterling set shot conversion from Jay Schulz and a clever about-turn from Justin Westhoff.
Carrying an 11-point lead into the first change, the Power looked to have lost none of its courage and bravery from the week prior where it defeated the reigning premiers Sydney.
Collingwood responded swiftly after quarter time though, and the old rivals battled throughout in a term that combined the best elements of each side’s contested and uncontested skills.
The Power found free space when it counted though, and two goals to Chad Wingard combined with a strong mark and set shot conversion from Westhoff to extend its lead.
It could have been a greater margin had a line-ball decision on a Justin Westhoff screamer 20 metres from goal gone the big Barossaman’s way.
Holding firm with a 16-point margin at the long break, Port needed to fire early in the third quarter to ease Collingwood’s pressure, but Travis Cloke again goaled early and closed the gap back to 10 points.
Port’s heart and courage was again on display for the 31,121-strong crowd to see, with its defence holding strong on several occasions.
Its reward was a drought-breaking goal from Angus Monfries at the 11-minute mark.
With only a goal apiece for the third quarter and a three-goal lead to Port at the final change, the home side would need to muster effort to hold on and claim victory.
And it did, with three goals at the hands of Ollie Wines, Schulz and captain Travis Boak, the Power would open a 38-point lead by the halfway mark of the term.
It was a clinical performance as the young Port side played its hardest peformance of the year to push out its six-goal buffer.
Collingwood was held scoreless until the 16-minute mark of the term when Sam Dwyer kicked the Pies’ first behind.
Justin Westhoff sealed the match with his brilliant snap around the body to push Port’s lead out to 43 points.
Midfielder Hamish Hartlett said the ability to defeat two quality sides in two weeks has instilled important
"We've shown that if we play the way we want to play and build trust among the playing group we'll get good results," said Hamish Hartlett post-game.
COLLINGWOOD 2.3 4.5 5.6 7.9 (51)
GOALS
Port Adelaide: Westhoff 3, Schulz 3, Monfries 2, Wingard 2, Brad Ebert, Wines, Boak
Collingwood: Cloke 2, Dwyer 2, Maxwell, Elliott, Kennedy
INJURIES
Port Adelaide: Cassisi (hamstring), Logan (Calf)
Collingwood: Nil
SUBSTITUTES
Port Adelaide: Ollie Wines replaced Dom Cassisi (hamstring) in the second quarter
Collingwood: Ben Kennedy replaced Kyle Martin in the third quarter
Reports: Nil
Umpires: Donlon, Bannister, Stevic
Official crowd: 31,121 at AAMI Stadium