LEWIS JUMPS 28- 1 4 AND COGHLAN WINS MILE AT MILLROSE

Carl Lewis again leaped past 28 feet in the long jump, and Eamonn Coghlan won a fifth Wanamaker Mile during the 76th annual Millrose Games at Madison Square Garden last night.

But the two world-class athletes had to share the spotlight with a pair of determined high school competitors, Mike Stahr, the miler from Carmel, N.Y., and Clinton Davis, a quarter-miler from Homestead, Pa.

Stahr won the invitation high school mile for a second successive year in 4 minutes 10.98 seconds. Davis, running in a section of the 400 meters, posted a faster time, 47.46 seconds, than Walter McCoy and Bert Cameron, two of the world's top-ranking quarter-milers.

Lewis's leap of 28 feet 1/4 inch was his third 28-foot indoor jump, and No. 3 on the career list. His series of 27-11 1/2, 27-3/4, 27-2 and a final 27-5 1/4 indicates that he is picking up where he left off as track and field's top performer last year.

''I felt pretty good,'' Lewis said. ''I was able to run well and run off the board. My timing was a little off, but that jump says I'm a little ahead of last year.''

Coghlan's winning time of 3 minutes 54.40 seconds was his secondfastest Wanamaker victory. Dr. Thomas Wessinghage of West Germany was 40 yards back in 3:57.95.