At the College Field, Victoria scored all their goals in a five-minute spell immediately after half time.
College master Lee Burns, who is assisted by Matt Smith, said: ‘It was a great start to the second half, there was little between the teams first half and overall it was our physicality on the ball that proved to be the difference between the teams.
‘Grammar’s players were more skillful than ours but we overpowered them with excellent work rate and strength.
‘The standard of our football was good and the three goals in quick succession pretty much ensured the victory.
‘It’s been a great squad effort, Matt Hanley has never played football before and he turned out to be very useful as a goalkeeper while Calum Brennan has been influential throughout and by far our best player.
‘He is an extremely creative player in front of the midfield and behind the centre forward, he has good feet and his ability has helped us gain a lot of wins.’
Burns also praised the contributions of two Year-11 students who have excelled in the squad, James Hudson and Bradley Rimeur.
Rupert Murray cut inside Grammar’s defence only to be brought down for a penalty which was struck home well by Calum Brennan side-footing the ball to the keeper’s left side.
Chris Mourant made it 2-0 after a bout of good passing allowed him through to slide the ball into the goal to the keeper’s right.
A pressing situation from Murray then resulted in a Grammar defender turning the ball into his own goal.
College squad: Matt Hanley, Mark Chipperfield, Henry Le Maistre, John Borg, Peter Rothwell, Rupert Murray, Joe Davies, Sam de la Haye, Gerry Brennan, Calum Brennan, James Murray, Tom Gibbs, Alan Falle, Chris Mourant, James Hudson and Bradley Rimeur.