The Saloon and estate reference article from the English Wikipedia on 24-Apr-2004
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Saloon and estate

Helping orphans the way you would do it
A Saloon Car can also be known as a Sadan (especially in North America). Basically its a Three Box car, Engine Bay, Space for the Occupants and a Boot.

A Estate Car can also be known as a Touring Car (not a Grand Tourer) and is a Two box design with an expended rear storage space.