Tesla Motors this week reported that first-quarter revenue had more than doubled year over year. During the subsequent earnings call, chief executive Elon Musk gave several insights into the company's plans, including a general timeline for the Model Y, the company's electric crossover sport utility vehicle. Musk says the vehicle will be crucial to meeting the company’s goal of delivering 1 million vehicles by 2020.
"I think we need to come up with the Model Y sometime in 2020 or,...