Analysis of information sources in references of the Wikipedia article "Station wagon" in English language version.
1954 Studebaker Conestoga two-door station wagon.
The estate body, also known as station wagons in some countries, has the roofline extended to the rear of the body to enlarge its internal capacity. Folding the rear seats down gives a large floor area for the carriage of luggage or goods. Stronger suspension springs are fitted at the rear to support the extra load. Hatchback: The hatchback is generally based on a sedan body but with the trunk area blended into the center section of the body. The hatchback is therefore halfway between a sedan and an estate car. This type of body is very popular due to its versatility and style. Although some hatchbacks are in fact sedan bodies with the trunk effectively removed (usually the smaller cars), many hatchbacks retain the full length of the sedan but the roofline extends down to the rear of the vehicle. As with the sedan bodies, a hatchback can have two or four passenger doors, however, there is a tendency to refer to hatchbacks as three or five doors because the rear compartment lid (or tailgate) is also referred to as a door on the hatchback bodies. As with the estate, the rear seats fold down to give a flat floor for the transportation of luggage or other objects. When the tailgate is closed, the luggage compartment is usually covered with a parcel shelf.
A three or five-door hatchback (no separate trunk compartment) is a 'two-box' car.
A three or five-door hatchback (no separate trunk compartment) is a 'two-box' car.