1/10 scale cars are called touring because they are sedans. 1/8 is the formula of r/c nitro cars. The bodies are called GTP, or a wedge.
Touring is sedan .12 class and have mostly 26 to 30mm tires on them.
1/8 is a .21 class with wedge bodies and really wide tires and a slim and light chassis build.
Hope this helps you boys out.
Peter