The automotive industry's transition to electric vehicles has made it possible to abandon multi-speed gearboxes, and in electric vehicles with motor wheels, there is no need for a gear differential mechanism. Instead of a heavy and complex gear mechanism, an electronic differential is used. Typically, the developed versions of the electronic differential were evaluated using computer modeling. Much less research has been conducted on real vehicles because it requires significant resources. It is relevant to perform road tests on prototype cars. A scaled-down prototype of a car with rear-wheel drive has been developed. An electronic differential has been designed based on the Ackermann-Jeantaud model. The theoretical trajectory was calculated in an iterative manner as a sequential rotation of the electric vehicle around a series of instantaneous centers of velocity. The theoretical trajectory was compared with the traces left by the prototype during a road test. The error in the actual position of the prototype compared to the calculated one does not exceed twelve percent. The performed slalom test showed that the designed electric car moves within the width of the lane, which corresponds to the width of the lane established for urban traffic. The value of the lane width was calculated taking into account the prototype dimensions. The movement of the car in normal mode and with the differential locked was also compared. The designed electronic differential allows for normal car control. Using a scaled-down car prototype allows for testing the electronic differential in road test conditions without spending money on purchasing and re-equipping the car.