Bore, stroke, displacement and compression for all 4 Toyota 89ci engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 89 ci |
|---|---|
| Cylinders | 4 |
| Bore | 2.874–3.051" |
| Stroke | 3.031–3.425" |
| Compression | 9.0–9.3:1 |
| Advertised power | 62–82 hp |
| Years | 1980–1994 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 1A-C | 89 ci | 3.0512" × 3.0315" | 9:1 | — |
| 3A-C | 89 ci | 3.0512" × 3.0315" | 9:1 | 62 |
| 3E | 89 ci | 2.874" × 3.4252" | 9.3:1 | 78 |
| 3E-E | 89 ci | 2.874" × 3.4252" | 9.3:1 | 82 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
2 of 4 are undersquare — stroke larger than bore, favouring torque low in the range.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.