Mercedes GLA-Class (2020) is 47 mm (1.85 inch) wider, 172 mm (6.77 inch) higher, 94 kg (207 lbs) lighter and has 135 liters (4.77 ft3) bigger cargo space than Opel Ampera (2014).
Opel Ampera (2014) is 88 mm (3.46 inch) longer than Mercedes GLA-Class (2020).