Shipping of disassembled cars could be done by pallets. Usually two cars could be loaded in one pallet.
Pallets size: L -2,4-2,7 m, W-1,8-2 m, H 1,8-2 meters
Pallets could also be made for loading inside the container, in that case one car to one pallet could be loaded. The size of pallet in this case will be L-2,10 m, W-2,40 m, L- 2,10