| Engine | Displacement | Power output (max.) |
| GASOLINE ENGINES |
| R-series |
| R80 | 79 cc (4.8 cu.in.) | 2.0 HP at 2,500 rpm |
| R100 | 98 cc (6.0 cu.in.) | 3.0 HP at 3,600 rpm |
| R160 | 163 cc (9.9 cu.in.) | 5.5 HP at 3,600 rpm |
| R180 | 179 cc (10.6 cu.in.) | 6.0 HP at 3,600 rpm |
| R200 | 196 cc (12.0 cu.in.) | 6.5 HP at 3,600 rpm |
| R210 | 212 cc (12.9 cu.in.) | 7.0 HP at 3,600 rpm |
| R225 | 223 cc (13.6 cu.in.) | 7.5 HP at 3,600 rpm |
| R270 | 270 cc (16.5 cu.in.) | 9.0 HP at 3,600 rpm |
| R280 | 277 cc (16.9 cu.in.) | 10.0 HP at 3,600 rpm |
| R300 | 301 cc (18.4 cu.in.) | 12.0 HP at 3,600 rpm |
| R390 | 389 cc (23.7 cu.in.) | 13.0 HP at 2,500 rpm |
| R420 | 420 cc (25.63 cu.in.) | 15.0 HP at 3,600 rpm |
| R440 | 440 cc (26.85 cu.in.) | 16.0 HP at 3,600 rpm |
| R670 | 670 cc (40.9 cu.in.) | 23.0 HP at 3,600 rpm |
| RS-series |
| RS100 | 98 cc (6.0 cu.in.) | 3.0 HP at 3,600 rpm |
| RVM-series |
| RVM110 | 113 cc (6.9 cu.in.) | 2.0 kW at 3,600 rpm |
| RV-series |
| RV110 | 113 cc (6.9 cu.in.) | 2.0 kW at 3,600 rpm |
| RV140 | 140 cc (8.54 cu.in.) | 4.0 HP at 3,600 rpm |
| RV150 | 150 cc (8.54 cu.in.) | 2.5 kW at 3,600 rpm |
| RV160 | 163 cc (9.9 cu.in.) | 5.5 HP at 3,600 rpm |
| RV170 | 173.2 cc (10.57 cu.in.) | 6.0 HP at 3,600 rpm |
| RV175 | 173.9 cc (10.61 cu.in.) | 3.0 kW at 3,600 rpm |
| RV225 | 223 cc (13.6 cu.in.) | 4.0 kW at 3,600 rpm |
| RV340 | 340 cc (20.75 cu.in.) | 13.0 HP at 3,600 rpm |
| RV670 | 670 cc (40.9 cu.in.) | 23.0 HP at 3,600 rpm |
| DIESEL ENGINES |
| Straight-3 |
| 3C11 | 1.07 L (65.3 cu.in.) | 18.5 kW at 3,600 rpm |
| Straight-4 |
| 4D24 | 2.45 L (149.5 cu.in.) | 36.8 kW at 3,000 rpm |
| 4D24T | 2.45 L (149.5 cu.in.) | 48.0 kW at 2,700 rpm |
