Engine freeze costly for Toyota

The governing body confirmed in 2006 that no development would be allowed in engines since the end of the season, meaning all teams had to submit their designs for 2007 before the season was through.

Marmorini says the late announcement meant Toyota had to ditch a planned new spec engine that they were aiming to introduce for the final races for the season.

"For a long time it was not clear what was planned, which for us meant keeping a lot of parallel projects alive to try to cover everything," said Marmorini. "That was the first issue.

"Secondly, there was the idea of introducing a rev limiter but, even if this was discussed before, no one thought it would go to 19,000rpm.

"We planned to introduce an engine during last season that was designed to rev much higher. It was an engine to finish the season with, and then properly introduce for 2007.

"Once it was clear that we had to homologate an engine in 2006 for 2007, we had to stop, so it was a big waste of resources and time."

Marmorini also made it clear that Toyota were unhappy about the engine freeze.

"We think (our engine) it's a good base, but as a racing team we were not happy about development restrictions because we were thinking of a lot of development we wanted to carry out," he added.

"The FIA has limited the possibility of re-tuning, which means that a lot of planned development that should have gone on the engine had to be stopped. As an engineer, this is something that I don't like."