Last week, a woman who identified Cpl. Lindsey Scott as the man who raped her and cut her throat in 1983 at Quantico Marine Base testified that the car in which she was abducted and attacked resembled a Chevrolet Nova. At the time of the attack, Scott drove a 1976 Buick Skylark.

In the ninth day of testimony at Scott's court-martial yesterday at Quantico, an auto parts specialist testified that 1976 Skylarks and 1976 Novas -- both midsize cars made by General Motors -- are similar in several respects, including a number of interior features such as the pull-down ashtray and round gas gauge that the woman said she remembered.

On cross-examination by Scott's attorney, John F. Leino, Thomas M. Lacey, auto parts manager at a Chevrolet and Buick dealership in Waldorf, acknowledged that the two models also differ in a number of respects, including hood ornaments (the Buick has one; the Chevy does not) and name plates.

It was the only testimony yesterday in Scott's trial, his second in less than five years on charges that he raped, sodomized, kidnaped and tried to slay the wife of a military policeman he worked with at Quantico.

At the first proceeding in 1983, Scott was convicted and sentenced to 30 years at hard labor. He had served 45 months of that term when the nation's highest military court set aside the verdict last summer on grounds that his former civilian lawyer did not prepare a competent defense.

The government's 20th and last scheduled witness, a pathologist who is returning to the United States from Spain to testify, is expected to take the stand today.

The defense is expected to begin its case Monday.