2026 Honda Civic Si
Transmission gear ratios, final drive data, and drivetrain specs for the 2026 Honda Civic Si.
US specification / FE1
Sources & engine identity
- Honda 2026 Civic specificationsgear ratios, reverse, final drive, tires, RPM limit
Engine designation L15CA linked to ACES base vehicle 181677 via SEMA Data / FRSport. ACES identifies fitment; the factory references supply gearing and RPM.
Stock manual / 6-speed / transmission source
Transmission gear ratios
| Gear | Ratio | Overall | Step |
|---|---|---|---|
| 1 | 3.643 | 15.847 | - |
| 2 | 2.080 | 9.048 | 1.751 |
| 3 | 1.361 | 5.920 | 1.528 |
| 4 | 1.024 | 4.454 | 1.329 |
| 5 | 0.830 | 3.610 | 1.234 |
| 6 | 0.686 | 2.984 | 1.210 |
| R | 3.673 | 15.978 | - |
Overall = gear ratio × final drive. Step = previous ratio ÷ current ratio.
Final Drive: 4.35Overall Spread: 5.310