Improved Tesla Model S among world’s fastest-accelerating cars, company says

Company announces new versions of electric car models S and X P100D with extended battery range – though Elon Musk admits: ‘It is a very expensive car’

Can Tesla downshift from $130,000 SUVs to mass market electric cars?

After unveiling the luxury Model X, Elon Musk’s company has a big challenge ahead as it aims for a bigger audience with its Model 3, promised for 2017