One of the reasons a Si engine can rev higher and longer is because it has over head cams. Alot less valve train weight then a push rod (L**) engine. Stiffer valve springs can be better for there own life which is why when you cam or put rockers in an engine the springs sound be changed to a higher poundage.
The thing is every engine has it'* nics and nacks. The engine is only as strong as it'* weakest points. With the GM 3.8'* it'* the Gaskets. Mopar 3.x'* it'* the crappy oil system. Toyota 2.2'* leak like sieves. Boxer engines get oil deprivation in the higher RPM ranges where their power bands are.
What I'm getting at is you really can't compare completely different engines. Especially 4'* 6'* and 8'*.
4'* are high, quick revving
6'* even split up between inline and V'* each having their abilities but share high torque
8'* big bang at low RPM'* to get going
Every engine should be apperitated for what they are. I mean we do have favorites. 3.8'* (and our GXP budd'* 4.6'*) are bad engines to pick as your team.
All I'm saying is I went way off course.
97SE-180*stat, Gutted Air Box, Green Air Filter, Rear Air Shocks
^Future^- HV3, Stage 2 Heads, L26 Upper, P&P LIM, LS6 VS, LS1 Retainers, N* TB, LQ4 Maf, CAI, 65-HD Trans, GT2 cam, SSEi sway ES links