These calculations are pretty hard since cars are all different and so are phones. We do know that the auto industry is about 1.7 trillion dollars per year, an

These calculations are pretty hard since cars are all different and so are phones. We do know that the auto industry is about 1.7 trillion dollars per year, and the phone market is about 500 billion. This suggests to me that autos are likely more. In total lifecycle though the energy used by autos is far far greater than by phones as well.