Porsche was not the last air-cooled car manufacturer.  Tatra continued making
its big T700 air-cooled V8 rear-engined sedans right up until March 1999
which was after Porsche ceased production of its air-cooled 911 sportscars.
And, of course, Volkswagen still make the air-cooled "old" Beetle in Mexico
and the air-cooled "old" T2 Transporters in Brazil.

Simon Glen, Toowoomba, Australia
1992 VW T3 Transporter Syncro van
1969 VW 411

Andrew Grebneff wrote:

> >I think it had to do with emisson standards and the air we breathe.
>
> That and noise-suppression; cooling fins vibrate and transmit a lot of
> noise. This is largely why Porsche, the last aircooled car manufacturer,
> changed to watercooling. The Japanese bike manufacturers changed long ago.