After a difficult start to the season, the car showed signs of progress in Australia, helped by an issue for Sergio Perez in qualifying, which saw George Russell take second on the grid and Lewis Hamilton finished runner-up in the race.
But speaking on the F1 Nation podcast Allison, who has returned to the technical director role after a job swap with Mike Elliott, said the car’s performance is still far below what the team expects.
"It's reliable, that's a definite strength," he said when asked about the characteristics of the W14.
"It's got very good pair of punters peddling it around. It's better than most of the grid out there. But until it's the quickest one, it will always feel like a weak car to all of us.
"It's adequately kind to its tyres, but not as good as some of the cars that we've made in the past. It's got more downforce than most of the cars on the grid, but not sufficient. Its handling characteristics leave a little to be desired, and need to be worked on for sure.
"But none of this stuff is revelatory. We've been talking about it most weekends. And it's part of what this team needs to address to get winning material back in our hands."
Allison didn’t want to be drawn on which circuits might favour the W14, but suggested instead that the parameters will shift as the year goes on and updates are introduced.
"It’s quite early in the season to be diagnosing what your car is great at or what it isn't great at, because the car's not a fixed thing," he said. "It's a platform that develops all the way through the year.
Source: Autosport