Nope, It likely will be traction limited. Again, powered unit by itself, maybe,
add 3 cars- probably stalls out. Add a curve into the grade and forgetaboutit.
Just my opinion and experience based on the Christmas LED lighted subway set. On a level grade tubular o-42 curve based elevated tubular track I cannot pull all 5 cars (the set was sold as 3+3 add-on). Again, just the friction of 5 cars on the level and its pushing the limit- let alone the extra drag in the curve.