Engine Sizes
Engine Displacement and Sizes
Determining your next engine size can be quite difficult without a reference. Check out the CMDIY standard bore, engine size chart to figure out how big your current engine is, or how big you'd like your next build to be!
Standard Standard Overbore Different Stroke
Size | Original Block | Engine Size | Bore Size | Over Bore | Stroke | Estimated Power | Estimated Torque |
|---|---|---|---|---|---|---|---|
| 850 | 850cc | 2.58" / 62.9mm | ---- | 2.688" / 68.26mm (std) | 34bhp | 44lb/ft | |
| 997 | 997cc | 2.458 / 62.43mm | ---- | 3.200" / 81.28mm (std) | 55bhp | 54lb/ft | |
| 998 | 998cc | 2.543" / 64.57mm | ---- | 3.000" / 76.20mm (std) | 41bhp | 52lb/ft | |
| 998 | 1014cc | 2.563" / 65.09mm | +020 | 3.000" / 76.20mm (std) | ---- | ---- | |
| 998 | 1030cc | 2.583" / 65.60mm | +040 | 3.000" / 76.20mm (std) | ---- | ---- | |
| 998 | 1046cc | 2.603" / 66.10mm | +060 | 3.000" / 76.20mm (std) | ---- | ---- | |
| 998 | 1062cc | 2.62" / 66.61mm | +080 | 3.000" / 76.20mm (std) | ---- | ---- | |
| 1100 - (998) | 1098cc | 2.543" / 64.58mm | ---- | 3.296" / 83.72mm | 45bhp | 56ft/lb | |
| 1100 - (998) | 1114cc | 2.563" / 65.09mm | +020 | 3.296" / 83.72mm | ---- | ---- | |
| 1100 - (998) | 1132cc | 2.583" / 65.60mm | +040 | 3.296" / 83.72mm | ---- | ---- | |
| 1100 - (998) | 1149cc | 2.603" / 66.10mm | +060 | 3.296" / 83.72mm | ---- | ---- | |
| 1100 - (998) | 1167cc | 2.62" / 66.61mm | +080 | 3.296" / 83.72mm | ---- | ---- | |
| 1100 - (998) | 1216cc | 2.68" / 68mm | 68mm | 3.296" / 83.72mm | ---- | ---- | |
| 1275 | 1275cc | 2.78" / 70.6mm | ---- | 3.200" / 81.28mm (std) | 63bhp | 70lb/ft | |
| 1275 | 1293cc | 2.801" / 71.145mm | +020 | 3.200" / 81.28mm (std) | ---- | ---- | |
| 1275 | 1302cc | 2.811" / 71.4mm | +030 | 3.200" / 81.28mm (std) | ---- | ---- | |
| 1275 | 1311cc | 2.821" / 71.65mm | +040 | 3.200" / 81.28mm (std) | ---- | ---- | |
| 1275 | 1330cc | 2.841" / 72.16mm | +060 | 3.200" / 81.28mm (std) | ---- | ---- | |
| 1275 | 1361cc | 73mm | 73.00 | 3.200" / 81.28mm (std) | ---- | ---- | |
| 1275 | 1379cc | 73.5mm | 73.50 | 3.200" / 81.28mm (std) | ---- | ---- | |
| 1275 | 1398cc | 74mm | 74.00 | 3.200" / 81.28mm (std) | ---- | ---- | |
| 1275 | 1406cc | 73mm | 73.00 | 84.00mm | ---- | ---- | |
| 1275 | 1426cc | 73.5mm | 73.50 | 84.00mm | ---- | ---- | |
| 1275 | 1440cc | 73mm | 73.00 | 86.00mm | ---- | ---- | |
| 1275 | 1460cc | 73.5mm | 73.50 | 86.00mm | ---- | ---- | |
| 1275 | 1479cc | 74mm | 74.00 | 86.00mm | ---- | ---- |
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