Bore, stroke, displacement and compression for all 8 Plymouth 2.2/2.5 engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 135–153 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.445–3.661" |
| Stroke | 3.622" |
| Compression | 8.0–9.0:1 |
| Advertised power | 93–224 hp |
| Years | 1989–1995 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| K | 153 ci | 3.6614" × 3.622" | 9:1 | 100 |
| K | 153 ci | 3.6614" × 3.622" | 8.3:1 | 150 |
| K | 153 ci | 3.6614" × 3.622" | 8.1:1 | 224 |
| Chrysler K 2.5 | 153 ci | 3.6614" × 3.622" | — | 99–100 |
| K | 135 ci | 3.4449" × 3.622" | 8.5:1 | 142 |
| K | 135 ci | 3.4449" × 3.622" | 8:1 | 174 |
| 2.2/2.5 · 3.445" × 3.622" · 9:1 | 135 ci | 3.4449" × 3.622" | 9:1 | 93–96 |
| K | 135 ci | 3.4449" × 3.622" | 8.1:1 | 174–224 |
Stroke is constant at 3.622" across the family — the displacement spread comes from bore, so these share a crank and differ in the block.
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.