The veteran revealed that overtaking Perez during the race in Sao Paulo was much easier thanks to the DRS, especially when compared to the challenging and winding track in Imola.
"It was easier in 2005 because it was non-DRS," Alonso said. "So that was probably easier. Now with the DRS, it seems a little bit different, and you have to play things a little bit differently as well.
"If in 2005 you lose the position, then it's bye-bye, you cannot recover and here I had another chance.
"It has been introduced to provide a little bit better show and today is a good example of that because you get overtaken two laps from the end and then you have another chance, especially here in Brazil.”
Following an impressive defensive race, Alonso successfully held off Schumacher's Ferrari in the last 12 laps to secure a memorable victory.
In the 2005 season, Alonso's main competition was Ferrari, represented by Schumacher and Kimi Raikkonen.
Despite Alonso contending with an unreliable engine while the Ferraris boasted a superior car, he managed to secure the 2005 drivers' world championship.
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