CYBEX Sirona S vs. UPPAbaby Alta: Which is Better? (2024)

Hi there! We're here to help you decide between the CYBEX Sirona S and the UPPAbaby Alta.

Our goal is to provide you with the information you need to feel confident that you're choosing the optimal car seat for your family's needs and budget. Let us know if you have any other questions!

At A Glance

Our Thoughts

The CYBEX Sirona S and the UPPAbaby Alta car seats offer distinct features suitable for different stages of a child's growth. Both emphasize safety and comfort, but they serve different age groups.

The CYBEX Sirona S is known for its innovative 360° swivel design; this feature is often praised by parents for its convenience. This convertible car seat can be used both rear and forward-facing, making it versatile for a child's growth. It accommodates children from infancy to toddler years with a maximum weight of 65 lbs in the forward-facing configuration. The seat provides advanced safety features, including SensorSafe technology, which offers critical alerts about potential dangerous situations. However, some parents have reported installation to be a bit challenging, and its size can cause issues in smaller cars.

The UPPAbaby Alta is a high-back booster seat designed for older children between 5 and 10 years old. It provides a spacious and thickly-padded seat ensuring comfort while maintaining tight security. It accommodates a weight range of 40-100 lbs and a height range of 38-57 inches, showing its broad range. The Alta is also equipped with unique safety features such as rigid LATCH connectors and a SecureFit belt routing system. The majority of parents reported the installation to be simple. However, some parents pointed out that the shoulder belt tends to slip out of position and the cup holder's position interferes with closing car doors.

In comparison, both car seats uphold safety and comfort for children. The CYBEX Sirona S, however, has a higher capacity, accommodating a maximum weight of 65 lbs in forward-facing configuration, against the UPPAbaby Alta's 100 lbs maximum capacity as a booster. Neither of these seats are FAA-approved for travel, making them less ideal for families often on the go.

The choice between these two will largely depend on the age, weight, and height of your child along with the space available in your vehicle. I recommend the CYBEX Sirona S for those with infants or toddlers due to its innovative features and safety technology. It's also suited for parents looking for a long-term car seat solution from infancy to toddler years despite its heftier price. For older children, however, the UPPAbaby Alta is a good fit. Its design caters to a higher weight and height capacity, ensuring a comfortable and secure ride for your growing child at a more moderate price.