The short answer
Based on available data, the Acura RDX comes out ahead of the Cadillac XT4 on power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Overall
Owners of the second-generation RDX (roughly 2013-2018) are overwhelmingly positive, repeatedly describing the V6 as smooth, potent, and long-lived, with many reporting 150,000 to nearly 300,000 miles on basic maintenance. The third-generation RDX (2019 and later) draws a split verdict: owners praise the turbocharged engine's mid-range punch, handling, and available ELS audio, but a substantial group reports infotainment problems, interior rattles, brake noise, and occasional turbo or head gasket failures. A recurring theme is that the older naturally aspirated V6 is viewed as the more trouble-free long-term choice, while the newer turbo four is seen as more fun but less proven.
Best version to buy
Insufficient owner data available to declare a single consensus. The strongest signal favors the second-generation V6 models, with 2013-2015 and 2017-2018 examples drawing the most praise for reliability and longevity, and the 2016-2018 facelift years noted for holding up well past 100,000 miles.
Known issues
Overall
Mixed sentiment with a clear generational divide. Feedback on the 2019-2023 models is notably more negative, centering on significant powertrain reliability concerns, particularly with the 9-speed automatic transmission, and various electrical/infotainment gremlins. The driving experience for these earlier models is often described as uncompetitive, with an underpowered and unrefined 2.0L turbocharged engine.
Best version to buy
For the 2024-2025 refresh, the Sport trim is frequently mentioned as the desirable configuration, offering a more complete feature set. The Premium Luxury trim is also noted for its value.
Known issues
The verdict
The Acura RDX is the better choice for most buyers.
It has stronger reliability sentiment in owner reports than the Cadillac XT4, based on the data above. If the specific known issues on the Acura RDX are a dealbreaker, the Cadillac XT4 is worth a closer look instead.
Common problems by model year
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Owner reports lean more positive on reliability for the Acura RDX than the Cadillac XT4. See the known issues comparison above for the specific concerns owners report on each.
Data on family-specific factors like cargo space is limited for one or both models, but based on available reports, both are positioned as practical daily drivers. Check the specs table above for seating and body type.
The EPA rates the 2026 Acura RDX at 23 mpg combined and the 2025 Cadillac XT4 at 25–26 mpg, depending on the version.
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Cadillac XT4 than the Acura RDX. See the known issues comparison above.