The largest model railway engine is the Thomas the Tank Engine character 'James', which is 264.3 cm high, 149.6 cm wide, 652 cm long (104.05 x 58.59 x 256.69 in) and weighs nearly 1.5 tons (236.2 st). The model was built by BBC Visual Effects (UK) for a Thomas the Tank Engine tour in 2003. James was the largest of four engines made for the tour, the other three were models of Thomas, Percy and Gordon. Each engine is powered by 4 x 48 volt 4 horsepower motors, totalling 16 horsepower. The track they run on is 155 m (508.53 ft) in length. The set is 24.38 x 24.38 m (80 x 80 ft) in size. The trains can still be classed as models due to the fact that if they were real trains the proportions of wheel diametre to train size would be different.