What is the main difference between an MDX and RDX?
In simple terms: the MDX is a larger, three-row midsize SUV, while the RDX is a smaller, two-row compact luxury SUV. This size and seating gap drives most of the differences buyers notice in space, capability, and price.
Size, seating and practicality
The MDX and RDX diverge most clearly in passenger capacity and interior footprint. The MDX is engineered as a three-row midsize SUV, able to accommodate more passengers and cargo with a greater overall interior volume. The RDX is a compact luxury SUV with two rows and five seats, prioritizing a sportier, easier-to-maneuver package in tighter spaces.
- Seating: MDX typically offers up to seven passengers; RDX seats five.
- Cargo and versatility: MDX provides more flexible seating configurations and greater total cargo space, especially with the third row folded or removed.
- Footprint: MDX is longer and taller, making it more comfortable for families with multiple occupants but potentially less nimble in urban driving; RDX is shorter and narrower, aiding parking and city maneuverability.
In practice, the MDX is the pick for families or groups needing more seats and cargo flexibility, while the RDX suits individuals or small families who want premium space in a more compact, agile package.
Powertrains and performance
Power options differ to match size and target buyers. The MDX offers stronger base power and, on some trims, hybrid or sport-oriented variants. The RDX relies predominantly on turbocharged four-cylinder engines, with a higher-performance variant available, but generally delivers less horsepower in its base setup than the MDX.
- MDX: typically paired with a robust V6 engine in base form, plus hybrid options and a high-performance variant in some generations (Type S) for enthusiasts who want more acceleration.
- RDX: uses a turbocharged four-cylinder as its common configuration, with a sportier Type S model offering enhanced output for those seeking sharper acceleration and handling.
For buyers prioritizing engine power and highway capability, the MDX often presents a more muscular baseline and a broader lineup. For those who value nimble handling and strong turbocharged efficiency in a smaller footprint, the RDX is a compelling choice.
Interior, technology, and pricing
Interior quality and technology align with each model’s size and market position. The MDX typically delivers a more spacious cabin with premium materials, especially in higher trims, and a broader suite of comfort and convenience options to justify its higher price. The RDX focuses on a premium, tech-forward interior with high-end materials and strong standard features, generally at a lower starting price than the MDX, though top trims can close the gap.
- Interior space: MDX emphasizes three-row practicality and cargo flexibility; RDX emphasizes a refined two-row layout with ample premium tech.
- Technology and features: both offer advanced driver aids and infotainment systems, but the MDX’s higher trims often include more luxury-oriented appointments.
- Pricing and value: MDX tends to sit at a higher price point due to size and seating capacity, while the RDX aims to deliver premium feel at a more accessible entry price.
In short, choose the MDX if you need more seats and space with a premium, feature-rich environment. Choose the RDX if you want a smaller, sportier luxury SUV with strong tech and a value-conscious price point.
Bottom line and buying considerations
Which SUV fits your needs?
Choose the MDX if you regularly transport seven people, require flexible cargo configurations, or want a more powerful lineup with three-row seating. Opt for the RDX if you prefer a compact, agile crossover with a premium interior, strong standard tech, and a lower starting price. Your decision should consider passenger needs, cargo habits, and how much space or performance you value daily.
Summary
The MDX and RDX cater to different buyers within Acura’s lineup. The main difference is size and seating: the MDX is a larger, three-row midsize SUV designed for families and maximum interior capacity, with powerful options and premium comfort. The RDX is a smaller, two-row compact luxury SUV that emphasizes agility, technology, and value. Depending on whether you prioritize capacity or a sportier, more compact experience, either model can be the right fit.
