Sebastien Bourdais has toasted his record-breaking season in the ChampCar World Series as one he will remember for the rest of his life.

The 28-year-old Frenchman won at Surfers Paradise in Australia to become the first man to win four straight titles in championship history.

And the Newman/Haas/Lanigan driver, who also claimed a runner-up spot at the Le Mans 24 hours with Peugeot this year, said he could not have imagined a better outcome.

"Well, I think if you look at it as a whole, 2007 is definitely a year to be remembered for me," said Bourdais.

"All in all, seven wins, six poles, finishing second at the 24, kind of qualifying for Formula One next year with these tests with Toro Rosso, you don't get so many chances in your career to drive in the same year an F1, sports car (indiscernible), and a Champ Car for the crown.

"I have to say I've got some tough time to put it into words because it's such unbelievable that it's a little difficult."

Bourdais will switch to Formula One next year after agreeing a deal to replace Vitantonio Liuzzi at Toro Rosso.

He leaves behind a series that has seen him earn 30 victories and 28 pole positions in just 72 starts, chalking up the best wins to starts ratio in series history and quitting the scene with just 12 less wins than all-time record holder Michael Andretti, who took some 350 starts to rack up his total.

Bourdais has one more race left in ChampCar, in Mexico City in a fortnight.

Jamie O'Leary / Eurosport