2018 BMW i3s first drive review: sportier and nearly as efficient

2018 BMW i3sBMW's Test Fest in Palm Springs, California, at The Thermal Club attracts a broad range of cars. The star of the show is the 600-horsepower 2018 BMW M5. But before I can test that wild sport sedan on the track, I’ll do my best to balance my carbon footprint in the new 2018 BMW i3s. BMW has added the i3s as a sportier model to the i3 lineup...