Going Spare quote "I suspect the wrong set of Technical Details has been entered for R3910 as the loco in real life is certainly not 90 feet long. Other than identity, the two models are identical so, while I think both will negotiate 1st radius curves, it might be worth seeking confirmation from Customer Services, who may also be able to provide an explanation for the differing prices." I spoke to Hornby technical services who weren't much help and that 5 pole motors were fitted to both these locos thanks.