Drivetrain losses are just lower than 20%.

I agree. I doubt that it is making 222 at the flywheel. The point that I wanted to get accross is that the torque curve is absolutely flat. this provides a lot of useable power at any engine speed. The old 20% constant driveline loss probably doesn't apply with the newer more efficient drivelines and manual transmission. I agree with tula771. the most I ever pull with my 4.2 is my boat which weighs about 4000 lbs. It will pull it with absolutely no problem. It doesn't even breathe hard. I have been very satisfied with the power output of my 4.2. It is a nice running engine.