Ayrton Senna of Brazil broke his two-day-old qualifying record yesterday with a 91.55 mph run through the streets of Monte Carlo to keep the pole for today's Monaco Grand Prix.

Senna covered the 2.068-mile circuit in 1 minute 21.314 seconds, compared with his 1:21.797 Thursday, to protect the No. 1 starting spot he won in provisional qualifying. It was the 45th time in his career he has been the top qualifier in a race.

Last year, he qualified at Monte Carlo in 1:22.308, then raced to a start-to-finish victory.

Senna will have former teammate Alain Prost of France beside him on the front row. Prost, now driving for Ferrari, posted a 1:21.776 late in the session to move up after a fourth on Thursday.

Nearly all of the drivers improved over the first qualifying session.

Starting third for today's 78-lap race will be France's Jean Alesi with a 1:21.801 in a Tyrrell-Ford. Riccardo Paterese of Italy guided his Williams-Renault to a 1:22.324.

Fifth was Senna's teammate, Gerhard Berger of Austria, 1:22.682, followed by Thierry Boutsen of Belgium in a Williams-Renault, 1:22.691.

Senna leads the Formula One standings after three races with 13 points. Prost and Berger each have 12. . . .

Dale Jarrett caught Dick Trickle on the final turn of the last lap and beat him to the checkered flag by three feet to win the Champion Spark Plug 300 NASCAR race at Charlotte (N.C.) Motor Speedway.