Heikki Kovalainen has admitted some disappointment about Caterham’s progress in 2012.
In its third season of formula one, and despite being clearly more impressive than its direct rivals Marussia and HRT, the Tony Fernandes-led team intended to take a step forwards this year.
Caterham took some upgrades to the Mugello test last week, but according to Finnish sources Turun Sanomat and MTV3, not all of them worked.
"The car has a pretty good balance, but the lap times are not good enough," Finnish driver Kovalainen is quoted as saying.
"It’s good to drive but it’s just too slow," he insisted.
"We did not get all the updates to work as we had hoped, so in Spain we have only some things that are new," added Kovalainen.
The team is yet to score a point.