Most powerful diesel locomotive: EE Type 5 Deltic. Not meaning to insult anybody here but Modern American diesels are sluggish and badly designed from a British perspective. No wonder the British train won!
P.S US steamers and early cab diesels are great, things only started going downhill when Penn Central was formed.
Ok your argument is grammatically better than Kamrans but still totally lacking in substance. The IC 125 is the only legitimate one in there, the mallard is officially the fastest but going downgrade and the locomotive could not sustain that speed in regular service, which is really what counts. The Deltic is the most powerful diesel in the world at 3300 horsepower? Thats the same as a run of the mill SD40-2, nothing special to see, and that is with two prime movers instead of one at that, double diesel US locomotives blow that out of the water. The hood unit style was actually a huge success compared to the cab units, the cab units were good for passenger service but very inflexible, the hood unit design works just as good for passenger service as for switching, I'd hate to be the poor guy switching on a class 47 having to climb up and down the ladder all the time. Not to mention the US gave the world the hands down best all purpose prime mover, the EMD 645.
Just counting EMD 645 powered units alone, they can be found in:
US
Canada
Mexico
Panama
Brazil
Argentina
Chile
Scotland
The UK
Spain
Denmark
Slovenia
Croatia
Serbia
Bosnia
Morocco
Algeria
South Africa
Egypt
Iran
Pakistan
South Korea
Hong Kong
Taiwan
I missed alot of countries I'm sure.....
Now if you want to count all US export models from EMD, GE and ALCO it would be easier to list countries that do not roster them. Now please list where British locomotives are still in use (hint: not even England!)