SUZUKA, Japan (AP) _ Nigel Mansell of England still believes he can overtake Brazilian Nelson Piquet for the overall Formula 1 driving championship, and Piquet isn't about to claim victory.

''In my reliable car, it may be possible to win,'' Mansell said Wednesday at a news conference for the Japan Grand Prix.

''We still have two more races so nothing is sure about who will win it,'' Piquet said.

Piquet led Williams-Honda teammate Mansell by 12 points with races yet to be run in Japan on Sunday and in Australia in November. The winner receives nine points, the runner-up six and the third finisher four in each Grand Prix race.

Mansell beat Piquet in the Mexican Grand Prix on Oct. 18, cutting Piquet's margin in the standings to 73-61.

And Alain Prost of France, fourth in the standings with 46 points, also has not given of hope of winning the title.

''I still have a chance,'' he said.