NEW DELHI, Aug 11 (Reuters) - From McDonald's and Coca-Cola to Amazon and Apple, U.S.-based multinationals are facing calls for a boycott in India as business executives and Prime Minister Narendra Modi's supporters stoke anti-American sentiment to protest against U.S. tariffs.

India, the world's most populous nation, is a key market for American brands that have rapidly expanded to target a growing base of affluent consumers, many of whom remain infatuated with international labels seen as symbols of moving up in life.