Trunk comparison: Hyundai Elantra GT Wagon vs VW Golf Wagon (Mk5)

Key Differences
With the seats folded down, the trunk of the Hyundai i30 wagon is 3.1 in (≈5%) longer than that of the VW Golf 5; with the first row of seats upright, the lengths are the same.
The trunk opening of the Golf is 2.8 in (≈10%) higher than that of the i30. The depth of the trunk (distance from loading edge → trunk floor) is 2 in (+400%) greater in the VW than in the Hyundai. The loading edge of the Golf stands 0.8 in (≈3%) higher above the ground.
At the narrowest point, the i30 is 0.8 in (≈2%) wider, while the width of the opening is 1.2 in (≈3%) greater in the Golf.
Impact on Usability
The significantly greater depth in the Golf is the most noticeable practical difference: a deeper trunk area offers more usable volume below the loading edge, allows better storage of bulky or taller cargo inside, and lowers the center of gravity of the load.
This facilitates stacking and better secures loaded goods against shifting.
At the same time, the combination of a deeper cargo area and slightly higher loading edge (Golf: +0.8 in) means that lifting heavy items out may require a bit more effort — items must first be lifted over a higher loading edge.
The slightly greater opening height of the Golf (+2.8 in) and the marginally wider opening (+1.2 in) improve loading and unloading of tall or wide items but only moderately reduce this disadvantage.
The i30 offers a more accessible load floor with its shallower depth: heavy cargo can be more easily loaded, unloaded, or slid in. Because the width at the narrowest point is minimally larger (+0.8 in), it is somewhat more flexible inside for wide loads, but overall the differences are minor.
Practical conclusion: Those who frequently transport bulky, tall, or stacked cargo and need more interior volume below the loading edge clearly benefit from the Golf.
Those who regularly handle heavy items and want convenient loading and unloading have slight everyday advantages with the i30 due to the shallower load floor.