it was possible to move under its own power, nearly full power could be summoned almost instantly from the cold engine of a diesel locomotive

it was possible to move under its own power, the diesel locomotive's engine, when cold, could produce nearly full power almost instantly

it could move under its own power, the diesel locomotive could summon nearly full power from a cold engine almost instantly

moving under its own power, the cold engine of the diesel locomotive could produce nearly full power almost instantly

moving under its own power, almost instantly a diesel locomotive could summon nearly full power from a cold engine