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EMD DDA40X at 6600 bhp most powerful diesel? Kestrel was number 8000. The 8000 referred to the fact that this locomotive was rated at 8000 bhp. I do not see therefore how the EMD DDA40X at 6600 bhp can be the most powerful diesel, unless you are referring to it as the most powerful diesel in use...

Of course Barlow Boy you are correct. And 1 hp is still 746 Watts! I was probably thinking of the Princess Coronation Class when I noted that in the earlier days of diesel, steam was still king, and that was 3300 hp at the bar of a Princess Coronation. Gresley noted that what could be done with...

Hmmm....interesting. I would take a look at GWR's King Class locos. You might be surprised. Diesels? An A4 Pacific could put down 3300kW to the rails. That was more than the first diesels that replaced them! Powerful diesels? HS4000 Kestrel was rated at 4000 hp. A lovely locomotive, BR senior...