kinda like a 3tc, and "half hemi".
wait.....22r is in the family of the 20r, 18rg, 2tg, 2tc, 3tc and 3tgte. inline 4's ranging from 1.6l eco and performance to 2.2's. MG had a 2.2l? it had to have been the size of the car itself, lol. funny though, 4ag's are very common bolt in MG restore...