The season has certainly not gone to plan for the Ibrox side. Going into this weekend's Old Firm meeting, Rangers are currently without a permanent manager and find themselves 33 points adrift of Celtic in the Scottish Premiership.
While it was abundantly clear early on that the two would not be battling for the title this term, few would have imagined that the league would be as one-sided as it has been.
And Drinkell has worryingly suggested that it may be several years before that gap between the two actually closes a significant amount.
Celtic's Moussa Dembele in action with Rangers' Clint Hill
“It’s a hard pill for Rangers fans to swallow and it will take at least another five or six transfer windows for my old club to get anywhere near the standards Celtic have set recently," he said, as reported by the Record.
“It’s unlikely Rangers can make up the gap in the short term unless Celtic drop their standards, sell one or two of their better players each year and settle for others that will simply keep them ticking over."
While the 56-year-old appears pessimistic about his former club, the situation could arguably be a lot bleaker if Rangers do not get their act together.
Celtic's Scott Sinclair in action with Rangers' Wes Foderingham
If they sign a list of players like the ones they brought in last summer, then it would surely be incredibly optimistic to suggest that the gap will close or even stay the same, as it seems unlikely that Celtic will not strengthen their options as their transitional period following Ronny Deila's disappointing tenure continues.
The Gers surely need to start showing signs of progress in the next window as it will soon be more and more difficult for them to lure better players to Ibrox, leaving the door open for the Hoops to bring star names to Parkhead.