As part of the deal the company will supply vehicles to support the organisers, teams and officials.

It is the first time the leading car manufacturer has been involved with rugby's showcase tournament.

Rugby World Cup Limited chairman Bernard Lapasset said: "This long-term partnership with an internationally recognisable brand further enhances the enormous prestige and attraction of Rugby World Cup in the global market place.

"Land Rover is a true champion of rugby from community to elite level and we look forward to working closely to promote it around the world across two tournaments that will position it in new markets, reaching out to new communities and audiences."

Land Rover's support of both tournaments extends the company's strong association with the game worldwide.

John Edwards, Land Rover's global brand director, said: "Today's announcement marks a significant development in the partnership between Land Rover and rugby.

"The company is proud of its ongoing support of the sport from a grassroots level to the elite game and it is fitting that the world's finest all-terrain vehicles - sold in over 160 markets worldwide - are now supporting the world's ultimate rugby competition.

"The International Olympic Committee's decision to include rugby in the Olympic Games from 2016 will have a hugely significant impact on the growth of the sport in emerging rugby markets such as America, China and Asia.

"This global growth is also shown by the IRB's decisions to host RWC Sevens 2013 in Russia and RWC 2019 in Japan.

"It is exciting to be involved with the Rugby World Cup and extend our partnership with rugby in such an exciting period.

"The RWC 2011 and RWC 2015 deal offers Land Rover a fantastic opportunity to further engage with our customers and general sports fans across the globe."

"We are also delighted to be confirmed as an official worldwide partner for Rugby World Cup 2015.

"Land Rover has been a long term investor in the development of the sport in the UK, so we are extremely excited to be furthering our association to the very highest level when the tournament returns to England."