You can make it happen, but you will need to add some things. This is also on smooth lino, which makes a big difference as there is little resistance to overcome when you start from a standstill. Electric motors draw most current when they break free from being static. Once the armature is turning it takes less amperage to keep them in motion.

All things that lower the overall friction will aid in smooth starting the tank. So wheel bearings, and lubrication all help this, where as extra weight, metal track, or anything else that contributes to the rolling resistance of the tank adds to the problem.

Gearing is also very important, Low gearing alone will help, but the gears themselves will need to be well lubed and smooth when free wheeling