Double world champion Fernando Alonso tries out the new Renault at a foggy Valencia

Alonso is all smiles as he prepares to take the 2008 Renault to the track for the first time at Valencia

Red Bull launch their new Adrian Newey inspired RB4 in Jerez

The Red Bull Racing team were beset by reliability issues last season, but are confident of a progressive 2008 campaign

It's all smiles for drivers Heikki Kovalainen and Lewis Hamilton at McLaren's 2008 launch in Stuttgart

McLaren unveil the MP4-23 which, they say, took 14,000 working hours to be ready for testing

McLaren are hoping their latest car will help them overcome the disappointments of a troubled 2007 season

World champions Ferrari aim to stay ahead of their rivals with the F2008, unveiled at team HQ in Maranello

Ferrari have stuck with their drivers Felipe Massa and world champion Kimi Raikkonen for the 2008 season

Ferrari engineers have introduced a completely new aerodynamic design for the F2008

World champion Kimi Raikkonen gets to grips with the new Ferrari during testing at the Fiorano test track in Maranello

Toyota launch their new car, the TF108, for the new season

Jarno Trulli (right) will joined by new driver Germany's Timo Glock in the Toyota hotseats

BMW Sauber have high hopes for their new F1.08 which is unveiled at the BMW World Centre in Munich

Robert Kubica (left) and Nick Heidfeld pose with the car that BMW Sauber believe can challenge Ferrari and McLaren