The 2021 BMW i4 could do the unthinkable: Unseat the M4

BMW's all-electric 4 Series, the BMW i4, will take on the Tesla Model 3 with more than 500 horsepower and 600 lb-ft of torque, it's suggested, but a bigger surprise is just where the sedan will fit in its family. Expected to launch in 2021, it'll mark a distinct change in strategy for BMW when it comes to electrification - and how it positions cars like the new M4.