Complex sentence: The Class 12E has the same power output as a Class 6E1, but with a higher gear ratio of 23/66 as compared to the 18/67 of the Class 6E1, which enabled it to run at a safe maximum speed of.
Split into simpler sentences: The Class 12E has the same power output as a Class 6E1, but with a higher gear ratio of 23:66, compared to the 18:67 of the Class 6E1. This enabled it to run at a safe maximum speed of.