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Sedan (automobile)

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A sedan is a specific type of passenger car designed for efficiency and organization.

Three body styles with pillars and boxes
Three body styles with pillars and boxes

Most sedans follow a "three-box" configuration. This means the vehicle is divided into three distinct compartments. The first box houses the engine at the front. The second box provides space for the passengers. The third box provides a separate area for cargo at the rear.

Sedan – Studebaker line radically reconstructed
Sedan – Studebaker line radically reconstructed

This layout helps separate the mechanical parts from the people and their belongings.

To function as a sedan, a car typically features a closed body with a fixed metal roof. A key structural component is the B-pillar. This is the vertical post located between the front and rear side windows. The B-pillar provides essential support for the roof structure. Most sedans include two rows of seats for passengers. While many people assume sedans must have four doors, some models only have two. The design often provides more headroom for rear passengers than a coupé. This is because a sedan's roofline usually slopes less steeply than a coupé's roofline.

There are many specialized variations of the sedan body style. A notchback sedan features a horizontal trunk lid.

2015 Chrysler 300 rear 4.8.18
2015 Chrysler 300 rear 4.8.18

In contrast, a fastback sedan has a more continuous, sloping shape. Some manufacturers create liftback sedans, which are five-door vehicles.

2018 Ford Mondeo (MD) Trend liftback (2018-11-22) 02
2018 Ford Mondeo (MD) Trend liftback (2018-11-22) 02

These have a short, sedan-like roof but a large rear hatch for cargo access. Another historical style is the hardtop sedan. Popular in the United States from the 1950s to the 1970s, hardtops lack a B-pillar. This creates an uninterrupted open space along the side when the windows are down. Because they lacked side bracing, these cars required heavy, strong chassis frames to prevent the body from flexing.

Other specialized styles include the close-coupled sedan and the club sedan. Close-coupled sedans were popular in the 1920s and 1930s.

1929Packard633CloseCoupled5PassengerClubSedanRightSide (cropped)
1929Packard633CloseCoupled5PassengerClubSedanRightSide (cropped)

These designs moved the rear seats further forward. This reduced the overall length of the vehicle body. In the United Kingdom, manufacturers also developed the "chummy" body. This was a close-coupled saloon where passengers were packed tightly together. The club sedan was a different type of highly appointed model used in the United States.

1932 Buick Series 90 4-Door Club Sedan Classic Car Club of America Museum (9427583825) (cropped)
1932 Buick Series 90 4-Door Club Sedan Classic Car Club of America Museum (9427583825) (cropped)

Additionally, some two-door versions with limited passenger space were known as coach bodies.

Chevrolet 1932 Standard 2-Door Coach (3593339692) (cropped)
Chevrolet 1932 Standard 2-Door Coach (3593339692) (cropped)

The history of the name "sedan" reaches back to the 17th century. The term is believed to derive from the Latin word "sedere," which means "to sit." It refers to the sedan chair, a type of enclosed litter.

Sedan-chair
Sedan-chair

These chairs were single-person boxes with windows. Porters carried them using long horizontal poles. Before automobiles, different countries used different names for enclosed carriages. In France, they were called berlines. In Italy, they were known as berlina. The 1899 Renault Voiturette Type B is sometimes considered a very early contender for the first sedan because it had a roof. However, the first official use of the word "sedan" for a car occurred in 1912.

Sedan – Studebaker line radically reconstructed
Sedan – Studebaker line radically reconstructed

This happened when the Studebaker Four and Six models were marketed as sedans. Some experts point to the 1911 Speedwell from Dayton, Ohio, as the first true sedan.

Terminology for these vehicles changes depending on where you live. In the United Kingdom, a sedan is commonly called a saloon. In Germany, the term Limousine is used. In many European countries, the term berline or berlina is standard. In the United States, Ford used unique marketing names like "Tudor" for two-door models and "Fordor" for four-door models.

1957 Cadillac Eldorado Brougham 4-door hardtop (7143765601) (cropped)
1957 Cadillac Eldorado Brougham 4-door hardtop (7143765601) (cropped)

These names were designed to help the public remember the different body styles. Even today, the term "saloon" is still used in the names of certain motor races.

Understanding the sedan helps us see how automotive design has evolved. From the human-powered sedan chairs of the 1630s to modern aerodynamic fastbacks, the goal has remained similar. Engineers have worked to balance passenger comfort, cargo space, and structural safety. For example, the U.S. government passed safety standards in 1973 to ensure roofs could withstand the weight of a car during a rollover. This helped protect passengers from the roof crushing into the cabin. Whether it is a compact hatchback-style sedan or a large luxury model, the sedan remains a fundamental way to organize how we move through the world.

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🖼️ Images & Media (15)
File:Three body styles with pillars and boxes.png
Three body styles with pillars and boxes.png
File:Sedan-chair.jpg
Sedan-chair.jpg
File:Sedan – Studebaker line radically reconstructed.jpg
Sedan – Studebaker line radically...
File:Renault Type B (1900) (cropped).jpg
Renault Type B (1900) (cropped).jpg
File:2015 Chrysler 300 rear 4.8.18.jpg
2015 Chrysler 300 rear 4.8.18.jpg
File:2018 Ford Mondeo (MD) Trend liftback (2018-11-22) 02.jpg
2018 Ford Mondeo (MD) Trend liftback...
File:1957 Cadillac Eldorado Brougham 4-door hardtop (7143765601) (cropped).jpg
1957 Cadillac Eldorado Brougham 4-door...
File:SunbeamRapierSeries1.jpg
SunbeamRapierSeries1.jpg
File:1929Packard633CloseCoupled5PassengerClubSedanRightSide (cropped).jpg
1929Packard633CloseCoupled5PassengerClubSe...
File:Bugatti Coach Type 73A (1947) pic1 (cropped).JPG
Bugatti Coach Type 73A (1947) pic1 (cropped).JPG
File:Chevrolet 1932 Standard 2-Door Coach (3593339692) (cropped).jpg
Chevrolet 1932 Standard 2-Door Coach...
File:Rover 3.5 coupe P5B ca 1967 profile shot showing lowered roofline.jpg
Rover 3.5 coupe P5B ca 1967 profile shot...

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