Bore, stroke, displacement and compression for all 34 Mercury FE engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 332–428 ci |
|---|---|
| Cylinders | 8 |
| Bore | 4.000–4.228" |
| Stroke | 3.299–3.984" |
| Compression | 9.6–12.0:1 |
| Advertised power | 208–610 hp |
| Years | 1958–1970 |
| Cylinder head data | 1 of 34 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 428 | 428 ci | 4.1299" × 3.9843" | 10.6:1 | 340 |
| 428 Cobra JET V8 | 428 ci | 4.132" × 3.984" | 10.6:1 | 335 |
| Q-code / R-code | 428 ci | 4.1299" × 3.9843" | — | 335 |
| 427 | 427 ci | 4.2283" × 3.7874" | 11:1 | 410 |
| 427 SOHC | 427 ci | 4.2283" × 3.7874" | 12:1 | 610 |
| W-code | 427 ci | 4.2283" × 3.7874" | — | 390 |
| 427 | 427 ci | 4.2283" × 3.7874" | — | 410 |
| Super 427 | 427 ci | 4.2283" × 3.7874" | — | 425 |
| 410 | 410 ci | 4.0512" × 3.9803" | 10.5:1 | 330 |
| 406 | 406 ci | 4.1496" × 3.7874" | 11.4:1 | 385 |
| B | 406 ci | 4.1496" × 3.7874" | — | 385 |
| G | 406 ci | 4.1496" × 3.7874" | — | 405 |
| FE (1963) | 406 ci | 4.1496" × 3.7874" | — | 385–405 |
| 390 | 390 ci | 4.05" × 3.784" | 10.5:1 | 300 |
| 390 | 390 ci | 4.0512" × 3.7874" | 9.6:1 | 266 |
| S-code | 390 ci | 4.05" × 3.784" | — | 320–325 |
| 390 | 390 ci | 4.05" × 3.784" | — | 250–266 |
| Super 390 | 390 ci | 4.05" × 3.784" | — | 300 |
| Interceptor 390 | 390 ci | 4.05" × 3.784" | — | 330 |
| 390-2V | 390 ci | 4.05" × 3.784" | — | 265 |
| 390P 2-V | 390 ci | 4.05" × 3.784" | — | 280 |
| 352 | 352 ci | 4" × 3.5" | 9.6:1 | 250 |
| 352 V-8 | 352 ci | 4" × 3.5" | — | 208 |
| H-code | 352 ci | 4" × 3.5" | — | 300 |
| X-code | 352 ci | 4" × 3.5" | — | 220–280 |
| Z-code | 352 ci | 4" × 3.5" | — | 300 |
| R-code | 352 ci | 4" × 3.5" | — | 335–360 |
| FE (1959–1963) | 352 ci | 4" × 3.5" | — | 220–360 |
| X | 352 ci | 4" × 3.5" | — | 220–250 |
| Y-code | 352 ci | 4" × 3.5" | — | 300 |
| 332 | 332 ci | 4" × 3.2992" | 9.6:1 | 225 |
| B-code | 332 ci | 4" × 3.2992" | — | 225–240 |
| G-code | 332 ci | 4" × 3.2992" | — | 265 |
| FE (1959) | 332 ci | 4" × 3.2992" | — | 225 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 9.6:1 to 12:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
30 of 34 are oversquare — bore larger than stroke, which favours revs over low-end torque.
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.