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Evenflo Symphony Sport All-in-One Convertible Car Seat vs Maxi-Cosi Romi 2-in-1 Convertible Car Seat, Infant

Updated August 2026 — Evenflo Symphony Sport All-in-One Convertible Car Seat wins on weight and harness limit, Maxi-Cosi Romi 2-in-1 Convertible Car Seat, Infant wins on height.

The Evenflo Symphony Sport offers greater versatility and safety features, while the Maxi-Cosi Romi is a lightweight and budget-friendly option.

Why Evenflo Symphony Sport All-in-One Convertible Car Seat is better

Weight Capacity

Evenflo supports up to 100 lbs.

Safety Features

5-point harness tested to 65 lbs.

Versatility

3 modes in one seat

Why Maxi-Cosi Romi 2-in-1 Convertible Car Seat, Infant is better

Weight

Maxi-Cosi is lightweight at just over 9 lbs.

Price

Maxi-Cosi is $40 cheaper.

Eco-Friendly

Made with recycled materials

Overall score

Evenflo Symphony Sport All-in-One Convertible Car Seat
85
Maxi-Cosi Romi 2-in-1 Convertible Car Seat, Infant
75

Specifications

SpecEvenflo Symphony Sport All-in-One Convertible Car SeatMaxi-Cosi Romi 2-in-1 Convertible Car Seat, Infant
Modes3 modes2 modes
InstallationInfinite Slide1-click LATCH
FabricStandardEcoCare
Safety TestingRollover testedStandard testing
HeadrestAdjustableAdjustable

Dimension comparison

Evenflo Symphony Sport All-in-One Convertible Car SeatMaxi-Cosi Romi 2-in-1 Convertible Car Seat, Infant

Overview of the Evenflo Symphony Sport and Maxi-Cosi Romi

When choosing a convertible car seat, the Evenflo Symphony Sport and the Maxi-Cosi Romi are two strong contenders, each offering unique features tailored to different families’ needs. The Evenflo Symphony Sport retails for $189.99, while the Maxi-Cosi Romi is priced at $149.99, making the Romi about 17% cheaper. Both car seats cater to various stages of a child's growth, but they take different approaches to safety and usability.

Safety Features Comparison

Safety is a primary concern for any parent, and both the Evenflo Symphony Sport and the Maxi-Cosi Romi have been designed with this in mind. The Evenflo Symphony Sport boasts a 5-point harness tested up to 65 pounds, providing a longer harness use before transitioning to a belt-positioning booster. It meets or exceeds federal safety standards and undergoes additional structural integrity and rollover testing. On the other hand, the Maxi-Cosi Romi also meets federal safety standards and is designed for infants weighing 5-40 lbs and toddlers 30-50 lbs. While both seats prioritize safety, the Evenflo's extended harness capability may offer more peace of mind for longer use.

Comfort and Convenience

When it comes to comfort, the Maxi-Cosi Romi features PureCosi fabrics that are soft and breathable, making it a comfortable choice for longer trips. Its lightweight design at just over 9 lbs makes it easy to transport, especially for families on the go. Conversely, the Evenflo Symphony Sport includes an adjustable headrest and dual cup holders for added convenience during travel. While both seats focus on comfort, the Romi's lightweight design gives it an edge for frequent travel.

Installation and Use

Ease of installation can make a significant difference in car seat usability. The Evenflo Symphony Sport includes features like an Infinite Slide™ Harness that allows for easy adjustments without uninstalling the seat, which can be a time-saver for busy parents. The Maxi-Cosi Romi is equipped with a 1-click LATCH system that simplifies installation, making it user-friendly for caregivers. While both systems aim to make installation hassle-free, the Romi's lightweight nature might allow for quicker transfers between vehicles.

Longevity and Versatility

Both car seats cater to children in various stages of their growth. The Evenflo Symphony Sport accommodates children from 5 to 100 lbs, allowing it to function as a rear-facing seat, forward-facing harness, and belt-positioning booster. The Maxi-Cosi Romi is designed for babies and toddlers from 5-40 lbs in rear-facing mode and 30-50 lbs in forward-facing mode. With a broader weight range, the Evenflo Symphony Sport offers more versatility over time, which could be a crucial factor for parents looking for long-term use.

Design and Aesthetics

In terms of design, both car seats feature modern aesthetics that can appeal to parents. The Evenflo Symphony Sport comes in a Charcoal Shadow color, giving it a sleek and neutral look that fits well in most vehicles. Meanwhile, the Maxi-Cosi Romi is available in a Sea Shadow color, which may attract those looking for a more vibrant option. While this may not impact functionality, the visual appeal of a car seat can influence a parent's choice.

Additional Features

Additional features can enhance the overall value of a car seat. The Evenflo Symphony Sport includes dual cup holders, which are practical for keeping drinks and snacks within reach. It also offers the benefit of live video support from a certified car seat safety technician for installation help. The Maxi-Cosi Romi stands out with its EcoCare fabric made from recycled materials, emphasizing sustainability. Both car seats provide added features, but the Evenflo's support options may be particularly beneficial for first-time parents.

Which should you buy?

Choosing between the Evenflo Symphony Sport and the Maxi-Cosi Romi ultimately depends on your specific needs. If you're looking for a long-lasting seat with a higher weight capacity and advanced safety features, the Evenflo Symphony Sport is an excellent choice at $189.99. However, if you prioritize a lightweight design and a budget-friendly option, the Maxi-Cosi Romi at $149.99 offers great value. Each car seat has its strengths, so consider your family's lifestyle, travel needs, and budget when making your decision.