Bore, stroke, displacement and compression for all 20 Chevrolet Ecotec engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 61–150 ci |
|---|---|
| Cylinders | 3, 4 |
| Bore | 2.913–3.465" |
| Stroke | 3.047–4.000" |
| Compression | 9.2–11.3:1 |
| Advertised power | 60–275 hp |
| Years | 1975–2019 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Ecotec · 3.465" × 4.000" · 11.3:1 | 150 ci | 3.4646" × 4" | 11.3:1 | 193–202 |
| LKW | 150 ci | 3.4646" × 4" | — | 196–197 |
| LE5 | 145 ci | 3.4646" × 3.8583" | 10.4:1 | 177 |
| L850 24L LEA | 145 ci | 3.4646" × 3.8583" | 11.2:1 | 182 |
| Ecotec · 3.386" × 3.724" · 10:1 | 134 ci | 3.3858" × 3.7244" | 10:1 | 140–155 |
| LSJ | 122 ci | 3.3858" × 3.3858" | 9.5:1 | 205 |
| Ecotec · 3.386" × 3.386" · 9.2:1 | 122 ci | 3.3858" × 3.3858" | 9.2:1 | 220–275 |
| LHU | 122 ci | 3.3858" × 3.3858" | — | 220–270 |
| Z09 package | 122 ci | 3.3858" × 3.3858" | — | 110 |
| Small GAS Engine 18L LWE | 110 ci | 3.1693" × 3.4724" | 10.5:1 | 138 |
| LWE | 98 ci | 3.1102" × 3.2087" | 10.5:1 | 138 |
| LY5 | 98 ci | 3.1102" × 3.2087" | — | 60–63 |
| LW5 | 98 ci | 3.1102" × 3.2087" | — | 68 |
| L17 | 98 ci | 3.1102" × 3.2087" | — | 65–70 |
| L18 | 98 ci | 3.1102" × 3.2087" | — | 74 |
| Ecotec · 2.913" × 3.409" · 10:1 | 92 ci | 2.9134" × 3.4094" | 10:1 | 160–170 |
| Small GAS Engine 14L LUW | 85 ci | 2.9134" × 3.2008" | 10:1 | 153 |
| L3T | 79 ci | 3.1102" × 3.4646" | 10:1 | 155 |
| LV7 | 73 ci | 2.9921" × 3.4646" | 10.5:1 | 137 |
| LIH | 61 ci | 2.9134" × 3.0472" | 10.5:1 | 105 |
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 11.3:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
10 of 20 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.