>>1054284Compared to old school DC diesel electric the fixed transmission reducing wheelslip is true, but for AC or the few separately excited DC setups, electric is better since the amount of slip can be precisely controlled.
Less acceleration was sort of a factor, purely through lower weight, since gearbox is generally lighter than alternator + control gear + motors.
Less noise depends on design.
More efficient is usually not true, wide range torque converters will typically be ~85% efficient at the top of the speed curve, but falls off dramatically below this. Fluid couplings as used on the high gear/s of most diesel hydraulic multiple units can get closer to 90%, but you're losing out on available power as engine RPM has to be near locked to output speed. Classic DC traction is typically ~80% efficient, but that's over a wide range. AC can push this closer to 90%.
