Comparison Britax Romer Discovery Plus vs Britax Romer Kidfix i-Size
Add to comparison | ![]() | ![]() |
|---|---|---|
| Britax Romer Discovery Plus | Britax Romer Kidfix i-Size | |
| Outdated Product | Outdated Product | |
| TOP sellers | ||
The XP pad reduces the pressure of the factory seat belt and stress on the cervical vertebrae during a collision. The Secure Guard technology, due to the additional attachment point of the regular seat belt, reduces the impact force to the pelvis and abdomen by up to 35%. | ||
| Weight group | 2 (15 – 25 kg) 3 (22 – 36 kg) | 2 (15 – 25 kg) 3 (22 – 36 kg) |
| i-Size | ||
| Age range | 3 – 7 years old 6 – 12 years old | 3 – 7 years old 6 – 12 years old |
| Recommended height | 100 – 150 cm | 100 – 150 cm |
| Installation | seat belt ISOFIX | seat belt ISOFIX |
| Installation | forward facing | forward facing |
| Adjustments | headrest height | headrest height |
| Equipment | removable cover anatomical cushion armrests | removable cover anatomical cushion armrests |
| Additional side protection | ||
| Harness type | none | none |
| Weight | 5.9 kg | 6.7 kg |
| Country of origin | Germany | Germany |
| Color | ||
| Added to E-Catalog | january 2023 | june 2021 |
Compare Britax Romer Discovery Plus and Kidfix i-Size
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Glossary
i-Size
The car seat meets the requirements of the European safety standard i-Size (ECE R129). Within the framework of this standard, it is assumed that child car seats are classified according to the height and age of the child, and not by weight (as was previously the case). It is also mandatory to fasten the retaining device using the Isofix system (see “Isofix fastening”). In accordance with i-Size requirements, car seats must be installed rear-facing until the child is 15 months old or reaches a height of 105 cm. All i-Size certified car seats must pass a side impact test. Chairs and cars that meet the requirements of the standard are marked i-Size, which confirms their full compatibility.
Additional side protection
The car seat has structural elements that further protect the child from side impacts. At least such elements include sidewalls for head protection made of impact-absorbing material such as polyurethane foam; torso protection may also be provided. If you are looking for a car seat with the maximum level of protection, you should choose from models with additional side protection.

















