Top Gun font here refers to the font used in the poster of Top Gun, which is a 1986 American action drama movie directed by Tony Scott.
The font used for the movie title in the poster is probably ITC Machine by Ronnie Bonder and Tom Carnase in 1970. The font is a commercial one and more details about it can be found here.
Download ITC Machine Font
The ITC Machine font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.