Kubica is a veteran of 76 Grands Prix but quit the sport in 2010 to pursue a career in rally driving.
The former BMW Sauber and Renault F1 star subsequently suffered a life-threatening 2011 crash but made a startling recovery to return to competitive driving.
He was even given a test drive by Renault earlier this year and while they instead chose to replace Jolyon Palmer with Carlos Sainz Jr, Williams are now interested in his services as they look to put a new figure into retiring Felipe Massa’s seat.
And Coulthard was quick to sing Kubica’s praises ahead of the Abu Dhabi Grand Prix, where he will be given further testing time by Williams.
“In terms of his outright speed, there’s no question that he’s one of the great talents that have emerged in motor racing and found their way into Formula One,” Coulthard, a Channel 4 F1 pundit, told Express Sport.
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“Of course it was terrible the accident that he had that led to him no longer being able to compete in F1.
“It would be a great story if he was able to [come back], 10 seasons since he won his Grand Prix.”Coulthard was on the podium in Canada in 2008 when Kubica secured his only F1 win to date.
Kubica’s later crash saw him break multiple bones and suffer a partial amputation of the arm and he still struggles some functions of his hand.
However, he showed strong pace in testing with Renault and Williams and Coulthard believes the teams would not have given his return such extended consideration if they thought the injuries were too severe.
“The polite and easy thing to say is that here’s no reason why he could come back but equally there is a physical reason why not,” Coulthard added.
“The team very quickly will be able to assess that.
“The fact that we are still having the conversation and we think it’s fine would suggest that the physical reason has not been put forward as a reason why he couldn’t compete in Formula One.
“So then it comes down to whether he has the same skills, hunger, desire and capability as when he was won that Grand Prix. At 32, he’s at a point when you mature your life skills into being the best version of what a racing driver can be. What’s omitted from that is the last few years of fine-tuning his Formula One skills. It’s challenging but not impossible.
“If he gets the drive, there will be much made of the fact that he’s dealing with a physical disability that he didn’t have before, but when the helmet goes on and the lights go out, that’s not a story any more. The story is whether he’s delivering or not.
“The team are best placed to see if he’s got the speed. They know what Paul [Di Resta, Williams test driver and also under consideration for 2018 seat] is capable of, because he’s driven for them, and they’ve got a benchmark in what Felipe has been doing.”
Channel 4 is the home of free-to-air Formula One in the UK with live coverage of 10 Grand Prix this season and comprehensive highlights of every race weekend. Watch the Abu Dhabi Grand Prix live on Channel 4 from 12pm on Sunday November 26.