The claim made ahead of the resumption of the WEC after its summer break at Fuji this weekend came despite a first podium for the French car at the previous round of the championship at Monza.
The #93 entry shared by Paul di Resta, Jean-Eric Vergne and Mikkel Jensen took the first top-three finish for the 9X8 after leading much of the opening stint of the Monza 6 Hours in July.
“At Monza we had good performance, very good at the start of the race, not so good at the end,” Jansonnie said.
“If you look at the performance over the full race, we are still missing a bit compared with Toyota and Ferrari.
“On top of that, we had an issue with one car."
The sister #94 entry driven by Loic Duval, Gustavo Menezes and Nico Muller was hit by gear-selection issues.
Duval, who will share #94 this weekend with Menezes and Peugeot reserve Stoffel Vandoorne after Muller was ruled out with an undisclosed injury, reiterated Jansonnie’s comments.
Of a victory, he said: “It still doesn’t feel that close, to be honest.
“When we saw the performance we had last year, and the momentum we have had since the Le Mans 24 Hours, I would say I have good expectations to be in the game.
“We had some hard times but it’s coming a bit towards us and we can try to raise our game and try to reach what we want to reach, which is a podium every weekend.”
Source: Autosport