BMW i8 (2015) is 1020 kg (2,249 lbs) lighter than Mercedes GL-Class (2014).
Mercedes GL-Class (2014) is 457 mm (17.99 inch) longer, 56 mm (2.20 inch) wider, 557 mm (21.93 inch) higher and has 526 liters (18.58 ft3) bigger cargo space than BMW i8 (2015).