Running an interim dark blue livery, AT&T Williams F1 launched the FW31 this morning in Portugal. The team are expected to reveal the full 2009 colour scheme next month.

Whilst the earlier launch from Renault could be considered to be rather low-key, the unveiling from Williams was almost non existent. Nico Hülkenberg was on hand to take the new chassis through paces on a damp track, but aside from that nobody had anything much to say about anything.

We're expecting more details to come to light during the teams technical debrief later today, but in the meantime, please do let us know your thoughts in the comments, how does the Williams compare to the Renault, and what do you make of this week's low-fi car releases?

The movie trailer from Totoya may have been verging on the preposterous, but at least they put some thought into it. As ever, we'll keep the thread updated with pictures and quotes as we find them.