The numbers in the 22r mean absolutly nothing about the displacement.
The 22r is a 2.4L engine.
The "R" engine started off as a 1.5L in 1953. Each time it was redesigned it was given a different number...2r, 3r, 4r, all the way up to 22r in 1995.
http://en.wikipedia.org/wiki/Toyota_R_engine
And the "Toyoda" that you see on steering boxes and other parts, is the original family name of Toyota. It was changed in 1936 from Toyoda to Toyota