The teaser microsite and email campaign will drive brochure requests and 24-hour test drive registrations, and will be followed by an online advertising push to coincide with the launch of the 308 in mid September.
The aim of the campaign is to promote the 308 as a stylish, high quality and efficient car and the executions will be based on the theme "inspired by nature".
Planning, creative and production are by Underwired with media buying by OMD.
This is the second campaign by Underwired for Peugeot following the agency's appointment to the car company's roster in January.
Ollie Griffin, Peugeot's manager of new media, said: "Our aim is to get people talking on and offline about the forthcoming 308 launch in September. We appointed Underwired to this task because of their experience at producing effective sites and online campaigns for brands such as LA Fitness, Virgin Megastores and Virgin Holidays."