Bore, stroke, displacement and compression for all 2 Cadillac 183ci engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 183 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.307–3.504" |
| Stroke | 3.161–3.543" |
| Compression | 11.7–15.0:1 |
| Advertised power | 270–277 hp |
| Years | 2010–2024 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| LM2 | 183 ci | 3.3071" × 3.5433" | 15:1 | 277 |
| LF1 / LFW | 183 ci | 3.5039" × 3.1614" | 11.7:1 | 270 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 11.7:1 to 15:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
The family mixes oversquare and undersquare designs, so members behave quite differently despite sharing a name.
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.