The other day i was going with 5 and a half people on board and the Turbo still had immediate response. Even my CL9 would need to build revs in such a situation and I would notice that it's laden with weight.
Can't imagine any NA engine south of a 3.0 which can match that. Make no mistake, I'm a huge fan of the R18 because it's the only 'real' VTEC I've ever experienced. And fact is, during everyday driving I hardly felt my Reborn was under powered compared to the other 2 monsters I had. So Oriel is no doubt good enough, especially cuz I know knocking can be a real pain because I've experienced it in my Turbo.