[ No headline ]

For the driver of a Chevrolet Corvette or Porsche, an antitheft system is sound advice. In 1981-82, the Corvette was the most likely car to be stolen. In 1980, the honor belonged to the Porsche, according to the Highway Loss Data Institute.

Car thieves, however, paid little attention last year to the Ford Escort station wagon and the 4-door Chevrolet Chevette, both of which had the lowest average loss payments per insured vehicle year. Car snatchers also ignored the 2 -door Toyota Corolla Tercel, although the 4-door Tercel was a higher-priority target.

The worst theft-claim frequencies in 1981-82 were reported for the BMW 320i.