BMW i8 (2015) is 1059 kg (2,335 lbs) lighter than GMC Sierra 3500HD (2014).
GMC Sierra 3500HD (2014) is 1140 mm (44.88 inch) longer, 90 mm (3.54 inch) wider, 686 mm (27.01 inch) higher and has 1837 liters (64.87 ft3) bigger cargo space than BMW i8 (2015).