| Class | Wheel Arr. | Dr. Dia. | Cylinders Dia. x Stroke | Boiler Press. | Ad. Wt. | EW WO | Grate Area | Evap. Surface | Sup. Surface | Remarks | 
| A | 4-4-0T | 39in | 10x16in | 140psi | 15t | 20t | 7sq.ft. | 370sq.ft. | none | Later 11x16 | 
| B | 4-4-0T | 39in | 12x18in | 160psi | 18t | 25t | 10sq.ft. | 505sq.ft. | none | |
| C | 4-4-0 | 39in | 12x18in | 140psi | 17t | 23t | 10sq.ft. | 505sq.ft. | none | |
| C1 | 4-6-4T | 54in | 14½x22in | 250psi | 38t | 76t | 24sq.ft. | 845sq.ft. | 180sq.ft. | 40 class | 
| C2 | 4-6-4T | 54in | 14½x22in | 250psi | 38t | 76t | 28sq.ft. | 855sq.ft. | 180sq.ft. | 40 class | 
| C3 | 4-6-4T | 54in | 14½x22in | 250psi | 38t | 76t | 28sq.ft. | 810sq.ft. | 180sq.ft. | 40 class | 
| D | 4-6-0 | 39in | 14x20in | 140psi | 20t | 26t | 12sq.ft. | 685sq.ft. | none | |
| E | 0-4-2 | 36in | 11½x17in | 120psi | 13t | 16t | 7sq.ft. | 430sq.ft. | none | BR E | 
| E | 4-6-0 | 51in | 14½x20in | 150psi | 21t | 29t | 13sq.ft. | 730sq.ft. | none | Perak 17 | 
| F | 4-4-0 | 51in | 14x20in | 140psi | 18t | 26t | 12sq.ft. | 675sq.ft. | none | |
| G | 4-6-0 | 51in | 14½x20in | 150psi | 22t | 30t | 13sq.ft. | 730sq.ft. | none | |
| H1 | 4-6-2 | 54in | 15½x24in | 180psi | 30t | 47t | 19sq.ft. | 1235sq.ft. | none | Light frame | 
| H2,3 | 4-6-2 | 54in | 15½x24in | 180psi | 31t | 49t | 19sq.ft. | 1235sq.ft. | none | 50 class | 
| H4 | 4-6-2 | 54in | 15½x24in | 180psi | 31t | 49t | 19sq.ft. | 1000sq.ft. | 215sq.ft. | 50 class | 
| I1 | 0-6-4T | 52in | 14½x20in | 180psi | 34t | 42t | 13sq.ft. | 805sq.ft. | none | |
| I2 | 0-6-4T | 52in | 14½x20in | 180psi | 34t | 46t | 13sq.ft. | 805sq.ft. | none | 30 class | 
| J | 4-4-2T | 33in | 10½x18in | 130psi | 12t | 24t | 9sq.ft. | 445sq.ft. | none | SUR 1 | 
| K1,2 | 4-6-2 | 54in | 17x24in | 180psi | 37t | 56t | 25sq.ft. | 1210sq.ft | 235sq.ft. | 54 class | 
| L | 4-6-2 | 54in | 17x24in | 180psi | 36t | 56t | 25sq.ft. | 1200sq.ft. | 285sq.ft. | 53 class | 
| M | 2-6-0 | 37in | 14x18in | 160psi | 24t | 28t | 13sq.ft. | 760sq.ft. | none | 95 class | 
| MacArthur | 2-8-2 | 48in | 16x24in | 185psi | 36t | 52t | 28sq.ft. | 1370sq.ft. | 375sq.ft. | 90 class | 
| Mallet | 0-6-6-0 | 44in | 13/19x22in | 180psi | 50t | 50t | 19sq.ft. | 1310sq.ft. | none | |
| O | 4-4-0 | 53in | 14x20in | 140psi | 16t | 24t | 11sq.ft. | 550sq.ft. | none | BR O | 
| O1,2 | 4-6-2 | 54in | 12½x24in(3) | 250psi | 37t | 58t | 27sq.ft. | 1110sq.ft. | 220sq.ft. | 56 class | 
| O3,4 | 4-6-2 | 54in | 13x24in(3) | 250psi | 37t | 60t | 27sq.ft. | 1110sq.ft. | 220sq.ft. | 56 class | 
| P | 4-6-2 | 54in | 17x24in | 180psi | 32t | 50t | 19sq.ft. | 1000sq.ft. | 215sq.ft. | 52 class | 
| Q | 4-6-2 | 54in | 17x24in | 170psi | 31t | 52t | 25sq.ft. | 990sq.ft. | 350sq.ft. | 51 class | 
| R | 0-6-0T | 42in | 16x20in | 160psi | 35t | 35t | 12sq.ft. | 560sq.ft. | none | 31 class | 
| S1,2,3 | 4-6-2 | 54in | 17x24in(3) | 180psi | 48t | 70t | 35sq.ft. | 1965sq.ft. | 325sq.ft. | 55 class | 
| T | 0-6-2T | 39in | 13x20in | 160psi | 24t | 31t | 10sq.ft. | 420sq.ft. | none | 32 class | 
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