The Voisin C5 was an automobile produced between 1923 and 1928.

The C5 was based on the C3 Sport and launched in 1923, initially either in bare chassis form or with the elegant four-seater factory torpedo body. Once again, the model's prestige was enhanced by several well-publicised celebrity owners of the time, such as the music hall star Mistinguett.

The great matinée idol Rudolph Valentino, who was such a committed Voisin enthusiast that he undertook the mechanical maintenance himself, owned several C5s.

1925 saw the C5, along with other models, equipped with startling 'prismatic' bodies. Gabriel Voisin (almost certainly in collaboration with André Noel) arrived at this uncompromisingly geometric form in pursuit of his three consistent objectives: reducing frontal area, weight, and improving handling by centralising weight distribution.

The only other change made in the model year was a slight increase in horsepower. From 1926 until the model was dropped the following year, the C5 came equipped as standard with Dewandre servo brakes.

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