A man stabbed several times during a fight between two groups in Sydney's west at 3am is in hospital undergoing surgery.

Fighting broke out between the groups at Soldiers Parade, Edmondson Park, before more people arrived in a third vehicle and joined in, police said.

A Range Rover allegedly rammed a Toyota Tarago before driving away.

The man who was stabbed suffered a collapsed lung and was taken to Liverpool Hospital in an unknown condition.

Two other men suffered lesser injuries.

No arrests have been made but officers have established a crime scene and are interviewing witnesses.