The current Hyundai i40 is 4,770 mm long, 1,815 mm wide and 1,470 mm tall, on a 2,770 mm wheelbase.
Only one generation of this model is in our catalogue, so there is no size history to compare yet.
Exterior figures are manufacturer specifications for the i40, averaged per generation across its variants and shown for the most common body style. Generations with the same size are merged. Boot capacity is the seats-up figure where the manufacturer quotes one.