EraVerdict: Cheap for a reason. Buy only with a recent rotary compression test and maintenance records, or budget for a rebuild.
At a glance
Risk 5/5 Market: Very cheap
Must-have records:
- Rotary-specific compression test (recent)
- Ignition coils/plugs
- Engine replacement/rebuild invoice
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Buy-risk rundown
| Issue | Symptom | How to check | Typical cost (as of Nov 2026) |
|---|---|---|---|
| Apex seal wear / low compression | Hard hot starts, rough idle, power loss | Rotary compression test (all faces) | Basic rebuild ~$3,500–$6,000; $5,500–$9,000+ with scored housings; coils/plugs $400–$1,200 [1] |
| Flooding on short cold starts | Won't start after brief run | Ask about usage; check plugs | Not yet sourced [1] |
Cost figures checked against the sources below in Nov 2026. Bracketed numbers refer to the source list.
Notes
- Cost range from ThreePiece.us buying guide; cross-check with a rotary shop quote.
Before you buy
Use our printable pre-purchase inspection checklist and get a PPI from a marque specialist.
Sources
- ThreePiece.us, RX-8 buying guide (accessed Nov 2026)
- Octane, RX-8 buying guide (accessed Nov 2026)
Last updated 2026-11-05. Costs vary by region and shop.
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