I find the M112 plenty adequate for "just driving around." Yes, the M113 is going to feel as if it's working less hard because it can just waft along on all that torque. But I almost never rev the M112 beyond 2500RPM in normal driving, how much less stressed can you get than that?

Relative to the M104 I find the M112 seems to have a smoother torque curve. It pulls better right off idle and doesn't suddenly come on the cams like the inline six. You could say it feels less sporting, but I find the power characteristics to be better for workaday driving. (I currently own one of each.)

- Jim