[kidrock]

Nikos,

my personal opinion is that the value has less to do with the motor, and more to do with the actual value of the vehicle. As is the nature with vehicles, the value will continue to drop until it hits an actual, "real" value...in other words, what the general public is willing to pay for that particular car at that particular time.

Eventually, the car value will hit an arbitrary bottom number. Then, as the car becomes more rare or desirable, the actual value will either level off, or rise in conjunction with it's desirability.

Again, I don't think that the dropping value of a more modern, air-cooled P-car has much (if anything) to do with the fact that it's water-cooled. Many people recognize that the newer generation Porsche has some flaws or reliability issues. What car doesn't? It's also very likely that in 20-30 years, these same cars may become very desirable and expensive...maybe even because they will be considered attractive as the first generation of water-cooled motors.