Bore, stroke, displacement and compression for all 7 Chevrolet 262ci engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 262 ci |
|---|---|
| Cylinders | 6, 8 |
| Bore | 3.671–4.057" |
| Stroke | 3.100–3.484" |
| Compression | 9.2–21.6:1 |
| Advertised power | 80–170 hp |
| Years | 1975–1996 |
| Cylinder head data | 2 of 7 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Chevrolet 262ci (1975) · 110 hp | 262 ci | 3.671" × 3.1" | 9.561:1 | 110 |
| Chevrolet 262ci (1985) · 80 hp | 262 ci | 4.057" × 3.385" | 21.6:1 | 80 |
| Chevrolet 262ci (1985) · 130 hp | 262 ci | 4" × 3.48" | 10.9:1 | 130 |
| Chevrolet 262ci (1988) · 140 hp | 262 ci | 4.001" × 3.48" | 10.9:1 | 140 |
| Chevrolet 262ci (1996) · 170 hp | 262 ci | 4" × 3.484" | 9.2:1 | 170 |
| LB1 | 262 ci | 4" × 3.48" | — | 155 |
| LB4 | 262 ci | 4" × 3.48" | — | 130–165 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 9.2:1 to 21.6:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
All 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.