Trunk comparison: BMW i4 vs BMW X2

Significant Differences (>10%)

Three measurements differ significantly: The depth of the trunk (loading edge to trunk floor) is 0.4 in (+11%) deeper in the BMW i4, the loading edge of the BMW X2 is 3.9 in (+14%) higher above the ground, and the width of the trunk at its narrowest point is 4.7 in (+14%) larger in the BMW X2 than in the i4.

Impact on Usability

The lower loading edge of the i4 makes loading and unloading heavy items easier — less lifting effort and better loading of boxes or heavy luggage.

The 0.4 in greater depth (11% relatively) also means slightly more usable floor space for longer or flat-lying items; the advantage is practically noticeable especially for longer, flat loads, even though it is only 0.4 in in absolute terms.

The X2 has significantly more width (+4.7 in) at the narrowest point, which facilitates storing wider or bulkier items (e.g., wide boxes, chairs, or sports equipment).

However, the higher loading edge (+3.9 in) makes lifting heavy loads more difficult and can make loading and unloading less practical for people with limited strength or when frequently transporting bulky items.

Other, smaller differences: The i4 offers a 3.9 in longer loading area with folded seats (+6%) and 2 in more length with the rear seat upright (+5%), as well as a 0.4 in higher trunk opening (+2%). These advantages slightly improve the i4's cargo volume but are less relevant than the above-mentioned >10% differences.

Conclusion

For frequent loading of wide, bulky items, the X2 is more advantageous due to the greater narrowest width. For easier lifting of heavy loads and somewhat more usable depth, the i4 is more practical. The decision depends on whether width or a low loading edge/easier handling is more important.