+1... not only that, but I would guess that most of the engine failures happen outside the warranty period to 2nd/3rd owners. Failures during the warranty period are generally covered.
EVERY engine fails at some time or another. And, engines of the same type will generally fail within a given mileage.
Add the variables of driving style, differing maintenance, oils, fuel and fuel quality, and the fact that the best available statistics (ad hoc though they may be) seem to point to a failure rate of only around 20% (certainly some of which are attributable to the driver/owner), and you'd have a fairly steep uphill climb to prove your case.
Also, Porsche wouldn't just lie down and die; they'd likely mount a pretty stiff and expensive defense. Such an action could well cost you close to a new engine anyway. It's not likely an attorney would take the case on a contingency basis, so you'd be out $$ upfront with no guarantees. Everyone could end up winning (Porsche, Attorneys, etc.) except you.
