The FIA's decision to impose a freeze on engine development late last year was one of the most difficult challenges the Renault team had to overcome in the design of its R27 car, according to engine chief Rob White.

Renault techncial director Bob Bell says his team is the one to beat in 2007, despite losing star driver Fernando Alonso to rivals McLaren.

Renault technical director Bob Bell insists that the switch from Michelin to Bridgestone tyres is not the biggest challenge facing his team this winter, as it prepares to mount a defence of its constructors' championship without Fernando Alonso.

Engineering director Jacky Eeckelaert says new wind tunnel has paid big dividends.

McLaren continues at Valencia

Weather continues to hit Ferrari test

Heikki Kovalainen insists he will not be playing second fiddle to Fisichella at Renault.

McLaren's new driver Lewis Hamilton crashed heavily in today's test session at Valencia. Hamilton was fortunately able to step out of the wrecked MP4-22 unhurt. His team-mate Fernando Alonso continued testing at Valencia, but without any problems.

Thursday was the third day of testing this week for Scuderia Ferrari Marlboro, working again today at the Vallelunga circuit, north of Rome, with Felipe Massa and Kimi Raikkonen.

Hamilton unhurt after badly damaging new McLaren in testing smash at Valencia.

Briton totals MP4-22 in Valencia testing.

Hamilton crashes at Valencia