Brawn GP's Jenson Button now holds a 12-point lead in the Formula One Grand Prix held in Bahrain over the weekend
It is ther Briton's third win out fo four races this year.
Red Bull's Sebastian Vettel was second, 7.1sec behind Button, and Toyota's Jarno Trulli took third at the Sakhir circuit.
Defending champion Lewis Hamilton was fourth for McLaren, ahead of Brawn GP's Rubens Barrichello. Kimi Raikkonen finished sixth to give Ferrari its first points of the season, with Toyota's Timo Glock and Renault's Fernando Alonso seventh and eighth.
"This race win for us is probably the best out of the lot, because we don't have a competitive edge," said Button, referring to his rival teams' recent improvement. "We are not as strong as we used to be and had to work doubly hard."
The English driver said he was excited to see how teams will improve with the slew of upgrades ahead of the coming rounds in Barcelona and Monaco.
"We have an upgrade in Barcelona, I just hope its enough," Button said.
"For Formula One this is great. Going back to Europe there will be even more change - this is what the sport needed and we have got it."