Automotive AssemblyAutomated Assembly Systems Tesla generates approximately $28,149 in profit per employee, more than five times the figure, $5,346, for its rival BYD. Last year, Chinese automaker BYD overtook Tesla as the world’s top seller of electric vehicles, at least in terms of number of vehicles sold. However, when automakers are ranked by revenue and net income per worker, a different story emerges: a contest of scale vs. efficiency.