BMW i8 versus M4 - track battle

Subscribe to the channel now: http://smarturl.it/autocar Can BMW's new electric superstar keep pace with its performance thoroughbred sibling? Steve Sutcliffe finds out Autocar, the world's leading motoring magazine and website, delivers industry-leading news, the most in-depth car reviews and opinion from our team of experts. Our presenters include some of the world's top motoring journalists who have unrivalled access to the world's fastest, rarest, most exotic and most exciting cars on some of the world's best roads and race tracks. Visit http://www.autocar.co.uk for the latest news, reviews and analysis New videos are uploaded to Autocar's YouTube channel each week. Don't miss a single one. Subscribe to the channel now: http://smarturl.it/autocar    / autocar   LIKE Autocar on Facebook: http://www.autocar.co.uk/facebook FOLLOW Autocar on Twitter:   / autocar   +1 Autocar on Google+: https://plus.google.com/+autocar