| Designation | 253 L.C. | 253 H.C. | 308 H.C. | 350 H.C. |
| Compression ratios | 8.0 : 1 | 9.0 : 1 | 9.0 : 1 | 8.5 : 1 |
| Cubic capacity (cu. ins) | 253 | 253 | 308 | 350 |
| Bore (ins.) | 3.625 | 3.625 | 4 | 4 |
| Stroke (ins.) | 3.062 | 3.062 | 3.062 | 3.48 |
| Horsepower – RAC rating | 42.05 | 42.05 | 51.2 | 51.2 |
| Horsepower – Max. gross at engine RPM | 174 @ 4400 | 185 @ 4400 | 240 @ 4800 | 275 @ 4800 |
| Torque (lbs/ft) – Max. gross at engine RPM | 247 @ 2400 | 262 @ 2400 | 315 @ 3000 | 360 @ 3200 |
| Kilowatts – Max. gross at engine RPM | 129 @ 4400 | 138 @ 4400 | 179 @ 4800 | 205 @ 4800 |
| Torque (Nm) – Max. gross at engine RPM | 334 @ 2400 | 355 @ 2400 | 427 @ 3000 | 488 @ 3200 |
| Firing order and cylinder numbering | 1-2-7-8-4-5-6-3 | 1-2-7-8-4-5-6-3 | 1-2-7-8-4-5-6-3 | 1-8-4-3-6-5-7-2 |