Answer: 24.96 inches.
This model car is having 1/64 scale which means the actual car is 64 times longer. To know the diameters of the actual car, you just need to divide the diameter of model car with the scale. If the diameter of the model is 0.39 inch then the calculation is:
Diameter of actual car x scale = diameter of model
Diameter of actual car = diameter of model / scale = 0.39 inch / (1/64)= 24.96 inch.
