sentences:  Although this approach compromised the front suspension geometry possibilities, the Toyota engineers came to the conclusion that this was not a problem.Owing to the new homologation rules on engines imposed by the FIA, the engine (called the RVX-07) was based on that used by Jarno Trulli in the 2006 Japanese and Brazilian Grands Prix.Only limited changes from this design were allowed, in order to optimise performance for the 19000 rpm rev limit which was enforced in 2007.