The upgrade comes soon after a new front wing was introduced at Silverstone, as the team tries to improve its performance in the wake of the recent huge leap made by close rival McLaren.
The team had a strong run when Esteban Ocon qualified fourth and finished third at Monaco, while Pierre Gasly was fourth-fastest in Q3 in Spain before being hit by a six-place grid penalty.
However, recent weekends have been frustrating, with the team lacking pace and logging consecutive double retirements in both Britain and Hungary.
Often when update packages come in stages the full picture isn’t seen immediately, although in this case the team stresses that the front wing wasn’t waiting for the new floor in order to fully optimised.
“The floor is independent of the front wing,” said Alpine sporting director Alan Permane when asked about the upgrades by Autosport.
“It’s important because we need to keep putting downforce on the car and moving forward and going faster. So it's very important. It isn't linked to the front wing, but it's a very significant step for us.”
Regarding future updates, he added: "There's definitely a large upgrade for Singapore, but I think there'll certainly be smaller stuff for example in Monza as well.”
Source: Autosport