Ferrari's Alonso came third and goes into the final round in Abu Dhabi next week with his lead over Webber cut from 11 points to eight.
Vettel is just 15 behind the Spaniard with McLaren's Lewis Hamilton 24 points off the pace and clinging on to his championship hopes by his fingertips in an unprecedented four-way last-race showdown.
Alonso now has 246 points, Webber 238, Vettel 231 and Hamilton 222.
In Image: From left, second placed Red Bull driver Mark Webber of Australia, Red Bull driver Sebastian Vettel of Germany , winner, Red Bull team principal Christian Horner,and third placed Ferrari driver Fernando Alonso of Spain pose for photographers on the podium after Brazil's Formula One Grand prix
Text: Reuters
Images: AP