Honda, who endured a bitterly disappointing 2007 campaign, hope the new car will help them improve their form during the coming season, which will be overseen by new team principal Ross Brawn.
The RA108 sported an interim white livery for its debut run, ahead of the cars official launch which will take place on January 29 at the teams UK factory in Brackley.
Also in action for Honda on Wednesday is Japanese hopeful Takashi Kogure in the Japanese team's older RA107 machine.
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