Joost:

BTW, I was thinking;
Nobody seems to want a 911 with a 4-cylinder engine, the only reason they might become reality is due to the pressure of the environmentalist lobby. Think of it what you may.

However, is it possible to have a 6-cylinder engine that runs with 4 cylinders only, and only switches to 6 cylinders when required? I think that would satisfy both the environment laws and the (a bit) the petrolheads...

 I think this technology is currently available on the Bentley GT 4.0 v8