Assertion: locomotive's diesel engine | /r/CapableOf | producing such power
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text: The decision to use two power cars was taken early in the project as design engineers calculated that the train would need 4,500 horsepower to sustain 125 miles per hour on the routes for which it was designed (the Great Western Main Line, Midland Main Line, and the Cross Country Route), and it was established that no "off-the-shelf" diesel engine was capable of producing such power.