Are you sure there was nothing wrong with your 960? The inline 6 is rated close to 200HP, while the 4 cylinder turbo in the 940 is 160HP. Now granted HP only tells part of the story, but the I6 should feel substantially more powerful than a stock B230FT. Was the kickdown function of the transmission working? Most engines with 4 valves per cylinder produce the bulk of their power in the higher RPM range just like the turbo engines. If the gearbox is not downshifted, they will feel sluggish.
Sounds like you have seen the light rear wheel drive or the expensive all whell drive are best .Front wheel drive is nasty on tire \ tyre wear and has problems with complexity as well as cost .