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| Cubic Inch | Year | Bore & Stroke | Firing Order | Estimated H.P. @RPM | Estimated Torque @ RPM | Compression Ratio | Carburetor | Valve Lifter Type | Normal Oil Pressure |
| 400 | 1971-74 | 4.34 x 3.38 | 1-8-4-3-6-5-7-2 | 180@3600 | 315@2400 | 8.2 | 2V,4V | HYD. | 30-80 |
| 400 | 1976 | 4.34 x 3.38 | 1-8-4-3-6-5-7-2 | 180@3600 | 315@2400 | 8.2 | 2V | HYD. | 30-80 |
| 400 | 1977-78 | 4.34 x 3.38 | 1-8-4-3-6-5-7-2 | 195@3600 | 305@3200 | 8.2 x 1 | 4V | HYD. | 50-75 |
