A Montgomery County judge has sentenced 22-year-old Gary L. Kohlenburg of Cabin John to five years in prison for drunk driving and vehicular homicide convictions stemming from an April 1981, accident that killed two people.

"After 15 years as a practicing lawyer, handling mainly accident cases, and 12 years on the bench, I have never seen a case that was any worse in the collision , speed and drinking involved," Circuit Court Judge Richard Latham said yesterday.

An expert witness from the University of Maryland had testified that Kohlenburg was traveling at about 90 miles per hour on River Road when he crashed into a car driven by Morris and Gertrude Kleinerman of Bethesda. Both victims were thrown from their car and crushed by the vehicle, police said.

Dr. Kleinerman was a professor of psychiatry at George Washington University. His wife Gertrude was the assistant director for school health for the Montgomery County Health Department. Kleinerman was 73 years old at the time of the accident and his wife was 62.

Prosecutor Stephen Savage said Kohlenburg had a blood alcohol level of .28 at the time of the crash, more than three times above the .08 level at which a driver is considered impaired under Maryland state law.

Kohlenburg was sentenced Wednesday to a pair of two-year sentences--to run consecutively--on two counts of automobile homicide, Savage said. The maximum possible sentence for that crime is three years. Kohlenburg also received a one-year sentence for driving while intoxicated.

There have been two other convictions for vehicular homicide in Montgomery County in the last 18 months, said Savage. In one case, the driver received a three-year sentence with 18 months suspended, and in the other the driver received the maximum sentence of three years.