Toro Rosso could not afford to wait for RBR to sign off on 2015 designs.
James Allison says not all expectations has been met.
#51 and #71 Ferrari drivers are confirmed.
The new V8 debuts at Geneva: track-level performance and responsiveness for the road.
Christian Horner says fans won't be disappointed with a new livery.
Kaltenborn remains confident that the team will make progress with the new C34.
GP3 champion Alex Lynn has joined Williams as the team's development driver, in addition to his already announced GP2 programme with DAMS.