| ITEM | Imperial | Metric |
| Wheel Arrangement | 4-6-2 | 2-3-1 |
| Length over buffers (including tender) | 72′ 11 3/4″ | 22.22 m |
| Maximum Height | 13′ 1″ | 3.99 m |
| Maximum Width (over cab side screens) | 9′ 2 7/8″ | 2.82 m |
| Total locomtive and tender weight (full) | 166 tons 2 cwt | 168.8 tonnes |
| Weight of locomotive only (full) | 105 tons 4 cwt | 106.9 tonnes |
| Adhesive weight (full boiler) | 66 tons 11 cwt | 67.7 tonnes |
| Maximum axle load | 22 tons 7 cwt | 22.7 tonnes |
| Boiler pressure (maximum) | 250 lb/sq in | 17.25 Bar |
| Nominal tractive effort @ 85% boiler pressure | 37,397 lb | 166.38 kN |
| Maximum speed | 100 mph | 160 km/hr |
| Diameter of driving wheels | 6′ 8″ | 2.03 m |
| Diameter of bogie wheels | 3′ 2″ | 0.97 m |
| Diameter of trailing carrying wheels | 3′ 8″ | 1.12 m |
| Cylinders | 3 | 3 |
| Piston stroke | 26″ | 0.66 m |
| Piston diameter | 19″ | 0.48 m |
| Valves | Inside admission piston type | . |
| Valve diameter | 10″ | 0.25 m |
| Valve gear | Walschaerts (3 sets) | . |
| Exhaust system | Double choke Kylala Chapelon (Kylchap) | . |
| Axle bearings | Timken taper roller throughout | . |
| BOILER | . | . |
| Type | Diagram 118 | . |
| Maximum diameter | 6′ 5″ | 1.96 m |
| Overall length | 29′ 2″ | 8.89 m |
| Distance between tube plates | 16′ 11 5/8″ | 5.17 m |
| Heating surface (firebox) | 245.30 sq ft | 22.79 m2 |
| Heating surface (small tubes) | 1211.57 sq ft | 112.56 m2 |
| Heating surface (superheater flue tubes) | 1004.50 sq ft | 93.32 m2 |
| Total evaporative heating surfaces | 2461.37 sq ft | 228.67 m2 |
| Superheater heating surface | 697.67 sq ft | 64.14 m2 |
| Grand total heating surface | 3141.04 sq ft | 291.81 m2 |
| Firebox | Wide (Wooton) type with combustion chamber | . |
| Grate area | 50 sq ft | 4.65 m2 |
| Grate type | Rocking with hopper ashpan | . |
| Small tubes | 121 x 2 1/4″ D | 57.2 mm D |
| Superheater flues | 43 x 5 1/4″ D | 133,4 mm D |
| Superheater elements | 43 x 4 pass elements | . |
| TENDER | . | . |
| Coal capacity | 9 tons | 9.14 tonnes |
| Water capacity | 5,000 gallons | 22700 litres |
| Weight (full) | 60 tons 18 cwt | 61.87 tonnes |
| Wheel arrangement | 8 wheels rigid frame | . |
| Wheel diameter | 4′ 2″ | 1.27 m |
Data courtesy Locomotives of the LNER Part 2A, published by the RCTS, 1986
Locomotives 60153-7 were fitted by Timken roller bearings and were hence slightly heavier. These had a total weight of 155 tons 2 cwt, and maximum axle load of 22 tons 7cwt.
Tornado carries 7.5 tons of coal and has a water capacity of 6,200 gallons.
