Just a few problems here. First, thorium is not fissile, which means that it does not fission when it absorbs a neutron (to be a little more exact, it fissions only if it absorbs a fast neutron), so, to be used in a reactor, it must be seeded with a fissile isotope, like uranium-235, uranium-233, or plutonium-239. The idea behind thorium reactors is that the thorium absorbs a neutron, becoming thorium-233, which then decays to uranium-233, but you’ve got to put up some initial U-233 (or U-235 or Pu-239) to get the reactor going.
The other problem is that the author of this article does not understand the concept of critical mass. To sustain a chain reaction, one must have some minimum mass of a fissile material to make it work. The mass depends on the geometry (a sphere of plutonium-239 roughly the size of a baseball and weighing a few kilograms makes a dandy critical mass as was demonstrated several times in 1945 - on the other hand give me tons of Pu-239 in a sheet ten feet wide and an inch thick, and it will never acheive a self-sustaining chain reaction, regardless of long the sheet is). For normal purposes, the critical mass of an isotope is measured in kilograms, not grams.
I wouldn’t pre-order a thorium-powered car any time soon.
If you don’t want the thorium powered car, their next article is on the water powered car ...
http://www.world-nuclear.org/info/Current-and-Future-Generation/Accelerator-driven-Nuclear-energy/
http://link.springer.com/article/10.3103/S1541308X08040031?no-access=true
The question is where is this guy getting his neutrons? Or is it a combo laser/ gold nano-particle attempt?