The Audi e-tron E-Foil prototype is actually not a product from Audi. The electric hydrofoil was co-designed by an engineer from Audi in his leisure time. The Audi marketing team picked up on it and presented it on different trade shows under e-tron brand. The company behind the product is called Aerofoils GmbH. The Audi e-tron efoil is panned to be launched 2021 under a not announced brand.