BMW 8 Series (G15) (2018) is 25 mm (0.98 inch) wider than Subaru Tribeca (2014).
Subaru Tribeca (2014) is 21 mm (0.83 inch) longer, 379 mm (14.92 inch) higher, 13 kg (29 lbs) lighter and has 644 liters (22.74 ft3) bigger cargo space than BMW 8 Series (G15) (2018).