There was a movie about two lions that preyed on railroad workers in India They originally thought it just one only to realize there were What the name of movie?

The movie you're describing is called "The Ghost and the Darkness" (1996).

It's a historical thriller based on the true story of two man-eating lions that terrorized railway construction workers in Kenya (not India) during the late 19th century. The film stars Val Kilmer and Michael Douglas.