The difference between aluminum and copper car radiators lies in their material, weight, thermal conductivity, and cost.

1, Material: Aluminum car radiators are mainly made of aluminum alloys, while copper car radiators are made of pure copper or copper alloys.

2, Weight: Due to the low density of aluminum, aluminum car radiators are lighter than copper car radiators.

3, Thermal conductivity: Copper has a high thermal conductivity, so copper car radiators have better heat dissipation performance. However, aluminum car radiators can also achieve good heat dissipation performance after design and optimization, and are more lightweight.

4, Cost: Relatively speaking, the cost of aluminum car radiators is lower because the price of aluminum materials is moderate, and the processing technology is relatively simple with lower production costs. The cost of copper car radiators is higher because pure copper or copper alloy materials are more expensive and the processing difficulty is greater.

In summary, aluminum car radiators have advantages in lightweighting and cost control, while copper car radiators have better thermal conductivity. The specific choice of radiator material depends on specific usage needs and budget considerations.