| Engine | Displacement | Bore & Stroke | Power output (max.) | Net Torque |
| Two-cylinders | ||||
| S107 | 1,070 cc (65.3 cu.in.) |
88.0 x 88.0 mm (3.46 x 3.46 in.) |
20.0 HP | – |
| S126 | 1,263 cc (77.1 cu.in.) |
92.0 x 95.0 mm (3.62 x 3.74 in.) |
23.0 HP | – |
| P126 | 1,263 cc (77.1 cu.in.) |
92.0 x 95.0 mm (3.62 x 3.74 in.) |
25.0 HP | – |
| S148 | 1,477 cc (90.13 cu.in.) |
97.0 x 100.0 mm (3.82 x 3.94 in) |
28.0 HP | – |
| Three-cylinders | ||||
| CS112 | 1,126 cc (68.71 cu.in.) |
75.0 x 85.0 mm (2.95 x 3.35 in) |
21.0 HP | – |
