Vettel's winning streak has seen him claim victories at the Marina Bay Street Circuit, Japan, Korea and India on Sunday as he triumphed again at the Buddh International Circuit, beating Ferrari's Fernando Alonso by just under 10 seconds.
It means Vettel now has a 13-point cushion over Alonso, who at least managed his best result since winning in Germany in July to keep his own hopes alive.
As you would expect from the fighter that is Alonso, and after his assertion following qualifying on Saturday he was "100 per cent confident" he would win the title, he was again defiant in the face of Vettel's current supremacy.
"This result was good news for us, seeing we could fight Red Bull in the race," said Alonso. "Right now there are 75 points available, and we are 13 behind, but we know we need to improve.
"We are not fast enough, especially on Saturdays, but hopefully we can improve the situation in Abu Dhabi or in the USA."