well my favorite engine i more specifically the b16b type r, cuz I love the type r, but I like all of the b16's. also its the engine that was designed togo in the car and I guess I don't havea specific reason why, but I like to see cars use the engines they were supposed to have, also it makes things a lot easier when doing the swap (not bashin anyone whohas a swap other than civic engines).I don't know enough about any of the engines to start spouting off technial specs at you guys, but its a good amound of hp right out of the box at 170 and it can be rebuilt to run NA very well, or can run FI very well also. not to mention that its more affordable than a b18 or a k20 swap.