Side-by-side brand comparison based on generator scoring data
Cummins has a dominant lead in our scoring dataset, with Ryobi close behind. The edge comes mainly from a stronger feature-set score and better value scoring. Choose Cummins if you want stronger feature and convenience coverage. Choose Ryobi if you are optimizing for a specific model match, budget, or feature mix.
Last updated September 29, 2026
Cummins and Ryobi occupy very different positions in the portable generator market. Cummins, operating under its well-known Onan sub-brand for portable models, earns a strong average overall score of 6.8 out of 10, while Ryobi trails significantly at 4.2. The gap is consistent across every scoring category, with Cummins holding advantages in value (5.7 vs 2.9), build quality (6.3 vs 3.7), practical features (6.2 vs 4.9), and feature set (7.8 vs 2.7). Cummins also holds a Tier A reliability rating at 91 out of 100, compared to Ryobi's Tier B rating at 70 out of 100.
When comparing top models head to head, the pattern holds. The Cummins Onan P4500i, the brand's highest-scoring unit at 7.4, outperforms Ryobi's best, the RYi2322, which scores 5.1. In the inverter category, the Onan P2500i (7.1) leads the Ryobi RYi2500 (4.3) by a wide margin despite an 81% similarity rating between the two units. Even in the mid-range and larger wattage classes, Cummins models consistently score 1.4 to 2.2 points higher than their Ryobi counterparts.
Ryobi does offer a broader product lineup with 9 scored models compared to Cummins' 5, giving buyers more options across different wattage classes and price points. However, a larger catalog has not translated into competitive scores in any measured category. For buyers prioritizing long-term dependability and overall performance, the data clearly favors Cummins as the stronger choice.
Cummins generators are the better fit for buyers who prioritize reliability, build quality, and a well-rounded feature set. With a Tier A reliability score of 91 out of 100 and an average features score of 7.8, Cummins models are suited for users who depend on their generator for consistent, dependable power, whether for RV use, job sites, or emergency backup. The Onan P4500i, scoring 7.4 overall, stands out as a strong inverter option for those who need clean, stable power for sensitive electronics.
Buyers willing to invest in fewer but higher-performing options will appreciate that every Cummins model in the scored lineup outperforms its closest Ryobi equivalent. The brand's higher value score of 5.7 (compared to 2.9 for Ryobi) suggests that despite potentially higher upfront costs, Cummins generators deliver more for the money over time.
Ryobi may appeal to casual or budget-conscious buyers who want a wider selection of models to browse and who have lighter, less frequent power needs. With 9 models in its catalog, Ryobi provides more variety across wattage classes, which could be useful for shoppers looking for a very specific size or configuration. The brand is widely available at major home improvement retailers, making it accessible for impulse or convenience purchases.
That said, Ryobi's scores are notably low across the board. Its average value rating of 2.9 and average quality rating of 3.7 suggest that even at lower price points, buyers may not be getting strong returns on their investment. The RYi2322, Ryobi's top-scoring model at 5.1, still falls well short of Cummins' lowest-scoring unit. Buyers considering Ryobi should weigh whether the convenience of availability and catalog breadth offsets the significant performance and reliability gaps shown in the data.
The best generator-to-generator comparisons between Cummins and Ryobi.
According to the scoring data, yes. Cummins holds a Tier A reliability rating with a score of 91 out of 100, while Ryobi is rated Tier B at 70 out of 100. This suggests Cummins generators are more likely to deliver consistent, long-term performance.
Ryobi has a larger catalog with 9 scored models compared to Cummins' 5. However, none of Ryobi's models score above 5.1 overall, while all five Cummins models score above 6.0.
Cummins scores 5.7 on average for value, nearly double Ryobi's 2.9. While Ryobi generators may carry lower sticker prices, the data indicates that Cummins delivers a stronger overall value proposition when factoring in quality, features, and reliability.
The top-scoring Cummins model is the Onan P4500i at 7.4 out of 10. Ryobi's highest-rated model is the RYi2322 at 5.1 out of 10. In a direct comparison, these two units share a 72% similarity rating, but the Cummins unit scores 2.3 points higher overall.
