All Porsches are true Porsches. I say it all the time: Porsche nowadays doesn't make any bad cars. The days of rebranding VW's as Porsches like the 914 are long gone.
But Porsche have to sell cars. And if the maket sees a beautiful car like the 911 and someone comes along with allot of money and says "nice car can I have it in a convertible?" Well if his cash is green like ours you best believe Porsche are going to get Gunther and Hans to come up with a way to make the 911 into a convertible.
A 911 Turbo Carbiolet is one of the finest sportscars on the planet. But its driven from a marketing point of view first, performance second. Otherwise there would be no reason to compromise its ridigidty. All that money and time into a sophisiticated engine and suspension to then set it back structurally?
I dont know I guess its like the saying "form follows function".
Design a 911 that was intended to be a convetible from the begining!
oh wait that called .....A BOXSTER!
