The Los Angeles Rams, who twice fired George Allen as their coach, will announce today that he has been hired for that post, The Washington Post has learned.

Sources indicated that Allen was flying to Los Angeles last night for the announcement today that he would take over the job vacated by Chuck Knox, now coach of the Buffalo Bills.

Allen was dismissed from his post as vice president, general manager and coace of the Washington Redskins by club President Edward Bennett Williams when contract negotiations broke down.

Allen has a 116-47-5 record as an NFL heas coach and was 9-5 with Washington last season.

Allen did not have a losing record in five season with the Rams and seven with Redskins.

He was fired twice by Dan Reeves before the late Rams' owner made stick. Allen was fired by Williams after he delayed signing a contract agreed upon in July, except for interpretation of terms. Allen was replaced by one of his former Ram and Redskin player players, jack Pardee.

Because of his preferece for proven veterans, Allen, as coach of the Redskin, traded away high draft choices. He dealth off the fiest eight picks for th upcoming draft and the Redskins do not have a No. 1 choice unitl 1979.

Allen is going to relatively young team that usually has extra draft choices acquired in deals by General Manager Don Klosterman.

However, Allen will be restricted to coaching only and it was understood he iwll have a short-term contract.

He had negotiated a salary in Washington of between $225,000 and $250,000 as coach, vice president, and general manager before deciding not to sign a four-year extension of his seven-year contract that had paid $125,000 annually, plus such perauisites as a chauffeur.

Serving as a coach only, Allen is not expected to earn as much as the Redskins paid him for three titles. But it is noteworthy that Dick Vermail reportedly earns $185,000 a year as coach for the Philadelphia Eagles, and Allen and Vermail have the same attorney, Ed Hookstratten of Los Angeles, who also handles some of the Rams' legal affairs.

Under the new 16-game regular-season schedule beginning in 1978, the Rams will play the three other teams in the NFC West Division twice each - San Francisco, Atlanta and New Orleans.

In nondivision contests the Rams will face Super Bowl champion Dallas, two other playoff teams - Minnesota and Pittsburgh - and Cincinati, Houston, Cleveland, Philadelphia, Green Bay, Tampa Bay and the New York Giants.

Currently, the NFC West is a relatively lopsided division that figures to be less competitive next season, with two teams regrouping under new coaches at San Francisco and New Orleans.

Pete McCulley, receivers coach for Allen at Washington the last season, has replaced former Ram assistant Ken Meyer as head coach of the 49ers.

The firing of Hank Stram has created a vacancy at New Orleans.

The Rams won the division with 10-4 record last season, but were upset by Minnesota in the first round of the playoffs, 14-7.

Atlanta, under former Ram assistant Leeman Bennett, finished second at 7-7: San Francisco was 5-9 and New Orleans 3-11.

Allen, 55, appararently agreed to rejoin the Rams without serious consideration of the vacancy at New Orleans, where a combined coaching and general managing job might have been available. He has maintained a home he owned in Palos Verdes, Calif., since he first coached the Rams.

Allen reportedly has always considered returning to Los Angeles, ever since taking the Redskins to the Super Bowl after the 1972 season against Miami. They lost, 14.-7.

Allen was bitter in his remarks, after his firing by Williams, contending he was not told face to face by Williams beforehand that he was going to be fired.

He charged Williams with interfering with the coach's decisions on whether to start Joe Theismann or Bill Kilmer at quarterback; deceiving the public about who signed big earners such as John Riggins and Theismann, and called the club president "a Jekyll and Hyde."

Allen was not reacheable by telephone last evening at his home. He was reported there as being out ot dinner with his wife, and then someone cut off the conversation by slamming down the phone.

Kilmer recently was notified by the Redskins that they have exercised their option to keep him for next season. But it is known he would be welcomed in Los Angeles if the Redskins wanted to trade him.

Kilmer twice previously has said he did not want to play again in Washington, but after Allen was fired he said he planned to play here in 1978.