 The exhaust system was an integrated structural component of the vehicle.The Armstrong Phaeton's motor was too powerful; the torque damaged the carriage wheels repeatedly.In 1900, while employed at Lohner Coach Factory, Ferdinand Porsche developed the "Mixte", a 4WD series-hybrid version of ""System Lohner-Porsche"" electric carriage that previously appeared in 1900 Paris World Fair.