BMW 1 Series (2015) is 423 kg (933 lbs) lighter than Chevrolet SS (2017).
Chevrolet SS (2017) is 637 mm (25.08 inch) longer, 132 mm (5.20 inch) wider, 50 mm (1.97 inch) higher and has 104 liters (3.67 ft3) bigger cargo space than BMW 1 Series (2015).