Ebere Eze returned to the Superhoops starting eleven, but the disappointing visitors suffered a crushing 3-1 defeat to Brentford at the Grifin Park on Saturday.
Three first-half goals from Benrahma, Mbeumo and Watkins undid the best efforts of QPR whose consolation goal was netted by Nakhi Wells off an assist from Bright Osayi-Samuel.
Meanwhile, Sheyi Ojo finally put an end to a nightmarish fourteen weeks without a goal or assist by notching a strike as Rangers thrashed Lokomotiv Tashkent 6-1 in an international friendly game also on Saturday.
The 22-year-old Liverpool loanee scored the second goal of the afternoon as the Gets completely outclassed the Uzbekistan giants. Ojo had not scored in a Rangers shirt since netting the winner in a Europa League tie against Feyenoord in mid-September.
But the Nigeria-eligible winger was on hand to turn home his goal minutes after Jermaine Defoe had opened the scoring for Steven Gerrard's men.
Further goals from Davies, Tavernier and a Stewart brace helped the Scottish side to an easy victory at the Sevens Stadium in Dubai.
Rangers return to FA Cup action on Friday at the Ibrox Stadium where they play host to League One side, Stranraer.
