The agency won the work following a four-way pitch.
The campaign involves a 50-day drive across 2,000 miles of central London’s streets in Hyundai’s zero-emissions ix35 Fuel Cell car, which emits nothing but water.
Photography and filming will take place throughout the drive, creating a mosaic image of up to 650,000 street pictures and a time-lapse video of the whole journey.
The route has been mapped out the Ordnance Survey team who delivered the Olympic Torch route and will be completed by some well-known personalities and employees of Hyundai Motor UK.
Natasha Waddington, head of PR at Hyundai, said: "2015 is a significant year for Hyundai Motor UK with a number of milestones to celebrate. Launch PR has given us a big, bold idea, backed by integrated execution, that will celebrate a landmark, get new conversations started, and improve awareness and perceptions of the Hyundai brand."
Johnny Pitt, founder and creative lead at Launch PR, said: "This type of brief does not come along often. Hyundai Motors' story is an incredible one that started in 1967. Today, it’s one of the most progressive businesses in the world and the scale of change within Hyundai’s UK business in the past ten years has been exponential."
The campaign launches today and will run until 19 November.