Originally Posted by mattliston

B16= dual cam 1.6 liter, many versions
B18= 1.8 liter of above, usually limited to around 6-7k revs. newer B16 can take 9.5k all day

D16= 1.6 liter single cam, lots of versions. stay away from d16y"x" (fill in number) blocks, they have severe oil flow problems. and no, a ported and shimmed oil pump wont save it

K20= hondas beginning of a new motor family. 2.0 liter, and ready to destroy the road. super reliable and very responsive to work on it. stock, the slowest one is rated at 160, can be built all motor to 350 estrimated crank. thats a lot of room. several 400hp turbo builds on stock internals. honda's new tank motor

I dont know much about the H and older F series. the newer F series is found in the s2000