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C7 (1924 - 1928)
Summer 1924 saw the launch of the new small Voisin, the C7.On a chassis only slightly longer than that of the C4S it replaced, this 10HP (1,551cc) was available in four configurations: bare chassis, torpedo, coupé de ville and saloon.

The latter was in the prismatic style, a novel talking point at that year's Paris Salon.

Mindful of the need to offer his clientele more space, Voisin also offered the same body styles on a chassis 10cms longer (the C7 L).

A particularly innovative body was announced the following year, which since became informally known in both two- and four-door forms as the 'Lumineuse' (a term never used by the factory).

The name derived from the slim A and B pillars which, together with a
generous glazed area, combined to assure an unusually airy interior with excellent outward visibility.

Type Chasselas on long wheelbase, 4 doors, 6 windows
On regular chassis, a nice little saloon.
The body incorporated several other innovations including:

- lightweight aluminium panels, allowing top speeds of up to 110kph, according to body style.
- an additional headlight mounted on the offside C pillar to illuminate the side of the road immediately ahead without blinding oncoming traffic. This arrangement was later adopted on other models.
- a novel lightweight door window opening mechanism whereby the entire glass folded down against the door panel.
- excellent weight distribution, thanks to the disposition of capacious luggage boxes on each running board as well as the rear, with a battery compartment concealed beneath the latter. All passengers were accommodated well within the wheelbase.
Manessius bodied a few C7-10CV in its very 'lumineux' own style.
The C7 was also available as a two-door coupé on the long chassis known as the Grand Sport. Does an example of this engaging Voisin curiosity survive?
After four years of production, during which some 1,350 were built, the C7 was withdrawn in 1928.