Mazda
RX-7
Owner report available
Mazda
RX-8
Owner report available
Mazda RX-7 vs Mazda RX-8
The short answer
Based on available data, the Mazda RX-7 comes out ahead of the Mazda RX-8 on fuel economy and 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.
Specs side by side
What owners say
RX-7
Overall
The sentiment is overwhelmingly positive, characterized by deep enthusiast admiration for the vehicle's unique character, timeless design, and engaging driving dynamics. The RX-7 is consistently described as a "dream car," a "joyous" driver's car that feels like an extension of the driver, and a vehicle that garners significant positive attention. However, this adoration is heavily tempered by a universal and very frequent consensus on the demanding, expensive, and specialized ownership experience.
Best version to buy
Consensus varies by generation and intended use. For simplicity, robustness, and longevity, the naturally aspirated (NA) second-generation (FC) is frequently cited as the most reliable and sensible choice, with its non-turbo 13B engine praised for durability.
Known issues
- Rotary engine reliability and maintenance demands: Requires meticulous care including mandatory premium fuel, frequent oil changes, proper warm-up, and vigilant cooling to avoid catastrophic failure from knocking or overheating.
- High operating costs: Poor fuel economy (reports of 16-20 MPG, or as low as 8 MPG on modified examples), constant requirement for premium fuel, and high oil consumption by design. Frequency: very frequent.
- FD-specific turbo system complexity: The sequential twin-turbo system in the FD is described as over-complicated and prone to issues with vacuum lines and pneumatic controls, leading many owners to simplify or convert to a single turbo set…
RX-8
Overall
Sentiment is deeply polarized and highly dependent on owner expectations and mechanical aptitude. The vehicle is universally praised by its enthusiasts for its unique driving character, described as a joy to drive with fantastic handling, a high-revving nature, and an unarguably unique experience. Long-term owners report deep satisfaction with the car's dynamics, often comparing its handling favorably to vehicles like the Honda S2000.
Best version to buy
The Series 2 (2009-2011) models, particularly the R3 trim, are identified as the most desirable. Owner feedback indicates the Series 2 received substantial improvements to the Renesis engine, suspension, and chassis, making it more reliable and better sorted than the Series 1 (2004-2008).
Known issues
- Engine apex seal failure / low compression: leading to loss of power, hard hot starting, and requiring a full engine rebuild. Cited as the primary, inevitable failure point. Frequency: very frequent.
- High fuel and oil consumption: described as having "borderline carbureted V8 fuel economy," achieving under 20 MPG (less than 12 L/100km), and consuming oil by design. Frequency: very frequent.
- Engine flooding: can occur if started and shut off without sufficient warm-up, requiring a clearing procedure. Frequency: recurrent.
The verdict
The Mazda RX-7 is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Mazda RX-8, based on the data above. If power matters more to you than running costs, the Mazda RX-8 is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Mazda RX-7 or the Mazda RX-8?
Owner reports show similar reliability sentiment for the Mazda RX-7 and the Mazda RX-8. Check the known issues listed above for specific differences between the two.
Which is better for families, the Mazda RX-7 or the Mazda RX-8?
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.
Which has better fuel economy, the Mazda RX-7 or the Mazda RX-8?
The EPA rates the 1995 Mazda RX-7 at 18 mpg combined and the 2011 Mazda RX-8 at 18–19 mpg, depending on the version.
Which is cheaper to maintain, the Mazda RX-7 or the Mazda RX-8?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Mazda RX-7 than the Mazda RX-8. See the known issues comparison above.