Zylinderköpfe
Die Motornummer ist Vorne auf dem Zylinderkopf. Hinten am Zylinderkopf befindet sich die Zylinderkopfnummer.
| Typ | Motor | ET-Nr. | Präfix | Typ | Motor | ET-Nr | Präfix | |
| Mk V | 2.5 | C1636 | Mk IX | C13799 | NC | |||
| 3.5 | C335 | C14958 | NC, NE | |||||
| XK 120 | C2242 | W, WF | Mk 10 | 3.8 | C19916/1 | ZA, ZB | ||
| C2242/1 | W, WF | 4.2 | C23241 | 7D | ||||
| C6733 | W, WF | C26202 | 7D | |||||
| XK 140 | C6733 | G | 2.4 Saloon | 2.4 | C6733 | BB | ||
| C6733/1 | G | 3.4 Saloon | 3.4 | C12500 | KE, KF | |||
| C7707 | G xxxx-xS | C14956 | KE, KF | |||||
| C7707/1 | Mk 2 | 2.4 | C14956 | BG, BH, BJ | ||||
| XK 150 | C12500 | V | 3.4 | C14956 | KG, KH, KJ | |||
| C14956 | V | 3.8 | LA, LB, LC, LE | |||||
| C14958 | VA | E-Type | 3.8 | C14957 | R, RA | |||
| C12600 | VS | 4.2 | C23241 | 7E | ||||
| C14957 | VS, VAS | C26202 | 7E | |||||
| Mk VII | C2242/1 | A | 3.4 S | 3.4 | 7B | |||
| C6733 | A, B, D, N ev. BD? | 3.8 S | 3.8 | 7B | ||||
| C6733/1 | N | 420 | 7D | |||||
| C7707/1 | only with H8 Carbs | Sovereign | 7A | |||||
| Mk VIII | C12500 | N, NA | XJ6 | 2.8 | 7G | |||
| 4.2 | 7L |
