Luke Scharf writes:

Steve wrote:
But there are more and more small diesels that run just as fast as
gasoline engines. There's no fundamental limit thats any different
than a gasoline engine, really, but up until now there's not been a
demand for high-RPM diesels.


When I was reading about the Volkswagen TDI engine, I vaguely remember
coming across someone who said that the redline of that engine was set
by the speed which which the burning fuel expanded.

My '01 180 bhp Audi 2.5 tdi V6 has a redline of 4500 rpm.



Sounds rather fundamental to me - but, then again, I'm a computer guy.

-Luke

Thomas