I am not sure what your aims are in this case - What do you really want from this car? If understeer is such a major concern then a front engine, fwd car is not the place to be looking, perhaps an Porsche 944? or similar.
In any guise a 916 is not an obvious track tool. What I can say for certain is that ,having owned both a TS and V6, when I get in and take the car for a blast, the speed, torque and noise of that 3.0 engine just make it a more exciting drive. I did love my TS - it was my first grown up car - and I had an amazing time in it, but the V6 is in a different performance league.
I say go for a V6 or forget the 916 and get something else!
Last edited by Snoot; 12-11-13 at 14:12.