Harper war eine britische Automarke.
Das Unternehmen A. V. Roe & Co Limited begann 1921 in Stretford in Trafford mit der Produktion von Automobilen. 1926 endete die Produktion.
Das einzige Modell war ein winziges Dreirad, bei dem sich das einzelne Rad vorne befand. Der Einzylinder-Zweitaktmotor von Villiers mit 269 cm³ Hubraum war unter dem Fahrersitz montiert. Ein zweiter Sitz konnte hinter dem Fahrer montiert werden.
Ein Fahrzeug dieser Marke ist im Museum of Science & Industry in Manchester in Manchester zu besichtigen.
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