Brake pedal pressure 1997 840ci auto

Just purchased 97 840ci auto brake pedal pressure seems to be quiet
hard (ie) a lot of pressure requied to brake car allthough the car stops fine . I am comparing the pressure required to a 97 740i e38
Can any owner provide imput as i dont want to replace parts unless nessasary. many years ago I owned a 89 850ci and a cannot remember the brake pedal pressure requied to be as firm as required on my 840