Question: why is 12v better than 6v?
Answer: The 'V' in 6V and 12V stands for 'volts,' a measure of electrical power, and refers to the power required to run the car's motor. ... The higher the number of volts, the more powerful the car. So a 6V kids electric car is the lowest power, a 12V is higher, and a 24V even higher than that.