Peugeot’s first million-seller wasn’t an engineering leap — it was Pininfarina’s first mass-market ponton, and it rewrote the rules for French family cars.
The Peugeot 403 is a mid-size saloon launched by Peugeot in April 1955 and styled by Pininfarina. It used a front-engine, rear-wheel drive layout and a 4-speed manual transmission. Its 1468 cc pushrod straight-four engine produced 58 hp, later increased to 65 hp. It featured ponton, three-box styling and a metal sunroof on most models. Over 1.2 million were built — the first Peugeot to exceed one million sales. The collaboration with Pininfarina marked the start of a fifty-year design partnership. A diesel estate debuted in autumn 1958.
Launched at the Trocadéro Palace in Paris on 20 April 1955, the 403 was Peugeot’s new mid-size saloon — built to last and built to sell.
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Styled by Pininfarina
Pininfarina’s ponton, three-box design defined its silhouette — and began a fifty-year partnership shaping Peugeot’s mainstream identity.
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Built to Scale
1,214,121 units sold. A pushrod four-cylinder engine grew from 58 hp to 65 hp — modest power, engineered for reliability.
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First Diesel Estate
The diesel estate arrived in autumn 1958 — Peugeot’s first diesel passenger car, and the start of its long diesel lineage.
Worth your time?
Yes. Drive the whole thing.
3.5/ 5
What works
ponton, three-box styling
metal sunroof on most models
front-engine, rear-wheel drive layout
4-speed manual transmission
What does not
independent rear suspension
disc brakes as standard
unitary construction
Drive it if
buyers who prioritised durability, practicality and incremental modernity
drivers seeking sporty handling
drivers seeking high-speed stability
Skip it if
drivers seeking technical innovation
The written brief1 min read
What the car is and where it came from
A mid-size saloon launched by Peugeot in April 1955, styled by Pininfarina and built from May 1955 to October 1966.
How it works, in terms someone would actually use
Front-engine, rear-wheel drive layout. Four-speed manual transmission. Pushrod-actuated straight-four engine with hemispherical combustion chambers and crossflow cylinder head.
What it gets right
Ponton, three-box styling gives clean visual separation of engine, cabin and boot. Metal sunroof (fitted to most models) adds light and air without compromising roof rigidity.
What it does not
It does not offer independent rear suspension. It does not feature disc brakes as standard. It does not use unitary construction — its chassis is separate from the body.
What it changed
It launched a fifty-year design partnership between Peugeot and Pininfarina, beginning with mainstream volume models.
Who it is for, and who it is not
It is for buyers who prioritised durability, practicality and incremental modernity over performance or novelty. It is not for drivers seeking sporty handling, high-speed stability or technical innovation.
Is it worth your time
Yes — as the first Peugeot to pass one million sales, it anchors a pivotal shift in postwar European mass motoring.