The agency is organising a four-night trip for 90 top performers from the automotive firm's parts and services division, plus Peugeot hosts to Vouliagmeni, near Athens next May.
"The client wanted somewhere warm, with a resort feel and within five hours' flying time of the UK," said Adding Value managing partner Tina Morris.
Destinations on the shortlist included Dubrovnik and Marbella.
Adding Value was selected after a four-way pitch. The contract represents the fourth piece of business it has won from Peugeot - a new client for the agency this year.
"This latest project shows that Peugeot still has faith in the power of incentive travel to motivate the workforce," said Morris.
Adding Value also organised Peugeot's sales manager incentive to Marrakech, and a sales executive incentive in the UK this month, and an incentive to the South of France earlier this year.