FA20 vs EJ25: which engine fits your build?
Both are popular Subaru platforms, but they solve different problems. Use this quick comparison to choose the right engine for your budget, timeline, and performance target.
FA20 highlights
- Modern architecture and common in WRX platforms.
- Strong option for newer chassis and stock-like drivability.
- Usually requires careful electronics and sensor matching.
EJ25 highlights
- Broad aftermarket support and familiar swap ecosystem.
- Popular for legacy Subaru builds and replacement projects.
- Condition history and maintenance records are critical at purchase.
Decision checklist
- Confirm your exact chassis fitment and transmission pairing first.
- Ask for mileage and compression information before committing.
- Budget for installation parts and preventive service items.
- Review warranty terms and claim requirements before payment.
Shop Subaru engines
Explore live listings in the Subaru inventory and contact us for compatibility help before checkout.