Two motors, diagrammed in the text, are proposed that are driven solely by Ampère repulsion between colinear current elements. Motor one involves sliding contacts with all current leads doubled with current in opposite directions, thereby precluding the presence of any magnetic B field and forces transverse to the current flow. Motor two involves mercury contacts that minimize friction and optimize current flow. Forces transverse to the current flow do no work; so only Ampère repulsion exists to drive motor two. These motors can demonstrate unambiguously the existence and magnitude of the Ampère repulsion, which then also demonstrates the failure of the Biot-Savart and Lorentz force laws, "Lorentz covariance", and special relativity.