Oh, how I do love the comparos! Today I’ve worked up a third tuner comparison, because frankly this interesting trio was just a bit too good to pass up – as were the other BMWs! But unlike the factory sourced Dinan and Alpina modded cars from earlier, this comparison focuses on some unusual Porsches. Supercharging isn’t the typical choice for the flat-6, but the bolt-on horsepower results are undeniable, bringing the normal flat-6 quickly up to Turbo levels of power. I have three generations compiled here, all popular in their own right but for different reasons. Which is the winner?