| Engine name | manufacturer | configuration | cylinders |
|---|---|---|---|
| Kestrel XII | Rolls-Royce | V | 12 |
| Kestrel XIV | Rolls-Royce | V | 12 |
| Kestrel XV | Rolls-Royce | V | 12 |
| Kestrel XVI | Rolls-Royce | V | 12 |
| Kestrel XVIDR | Rolls-Royce | V | 12 |
| Kestrel XXX | Rolls-Royce | V | 12 |
| Kinsei 3 | Mitsubishi | Radial | 14 |
| Kinsei 41 | Mitsubishi | Radial | 14 |
| Kinsei 42 | Mitsubishi | Radial | 14 |
| Kinsei 43 | Mitsubishi | Radial | 14 |
| Kinsei 44 | Mitsubishi | Radial | 14 |
| Kinsei 45 | Mitsubishi | Radial | 14 |
| Kinsei 46 | Mitsubishi | Radial | 14 |
| Kinsei 48 | Mitsubishi | Radial | 14 |
| Kinsei 51 | Mitsubishi | Radial | 14 |