BMW 1 Series (2014) is 300 kg (661 lbs) lighter than BMW 7 Series (2014).
BMW 7 Series (2014) is 738 mm (29.06 inch) longer, 154 mm (6.06 inch) wider, 67 mm (2.64 inch) higher and has 155 liters (5.47 ft3) bigger cargo space than BMW 1 Series (2014).