Partially manufactured from aluminium alloy, the C 23 Voisin was powered by a 6-cylinder in-line engine, a valveless Knight system, with 3 litres producing 90 bhp and was fitted to a Cotal gearbox with 2 mechanical gears and 2 electric ones. On this model, the front wings are braced, a reminder of Voisin's skills as an aeroplane manufacturer.