Jan.11 (GMM) Giancarlo Fisichella, who on Thursday was unveiled as a Force India driver for 2008, says he is disappointed with Renault.

The Italian winner of three grands prix - two of them with Renault - claims that, following three consecutive years at the French team and another four in its previous Benetton guise, the Enstone based outfit failed to fulfil its promise of a winning car.

Asked by La Gazzetta dello Sport if he is disappointed with Renault, 34-year-old Fisichella answered: "Yes, very much, especially because of the many years together.

"The winning car they promised never came," added Fisichella, who was double world champion Fernando Alonso's teammate in 2005 and 2006.

The Roman also revealed that he was surprised when he first tested Spyker's 2007 car recently, which was usually the slowest F1 single seater last season.

"It is very similar to the (Renault) R27, as it lacks aerodynamic grip," Fisichella told F1's official website.

"For sure it needs a big upgrade with a lot of wind tunnel work, but the baseline is as good as Renault's," he added.