Difference between sedan and saloon
Saloon (Similar to the American term Sedan, an enclosed car body style with a separate boot (trunk). according to this website http://en.wikipedia.org/wiki/Saloon different ways to call it, otherwise it is the same thing.
make sure not to confuse saloon with salon, they both mean something different
While the two are today, the same in size, Sedans and Saloons were once quite different. A Saloon was a larger car, not quite as large as a limousine, but every bit as luxurious. Typically, a Saloon often was Chauffeur driven, while a Sedan was driven by it's owner. Sedans in the 1930s were generally a smaller car than a Saloon, but after ww2 the manufacturers in the US began building much larger automobiles; when these hit the British market, they were often refereed to as "Yank Tanks". Saloon today, implies a more luxurious vehicle; A jaguar S-Type 4.2 would be regarded as a Saloon, whereas a similar sized Honda would be a Sedan.
Also, a Saloon, proper, will have a longer wheelbase, which allows for more rear seat leg room.