Siemens has announced it's competing design:
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Siemens Rail Systems and Cummins jointly announced a partnership on Dec. 3, 2013 that they said "will bring one of the most modern and efficient passenger rail, diesel-electric locomotives in the world to the U.S. marketplace."
The companies said Cummins QSK95 diesel engines will be used in Siemens' diesel-electric locomotives in the U.S., "resulting in one of the most energy-efficient, lightweight, smart, diesel-electric locomotives available today in North America...
...The locomotives will be built and assembled at Siemens' solar-powered transportation manufacturing facility in Sacramento, Calif. Cummins diesel QSK95 engines will be made in Seymour, Ind. The 95-liter prime mover is the most powerful high-speed 16-cylinder diesel to be installed in a locomotive generating more than 4,000 hp (2,983 kW), the companies said.