why has bx16v got no low down torque??

[csg100]

Interesting graphs - you can clearly see the extra breathing ability the extra 8 valves give to the engine! And to me it looks like the 16v is a pretty well designed engine. The 8v is a good engine IMHO and the 16v manages to more or less match it to 4.5krpm and then takes off.

Whats the difference between the XU9J2 and the XU9JA?

[kriskarrera]

Camshaft, head, inlet manifold

[Toddman]

This has been discussed many times and the true answer is always the same -
The 16v out performs the 8v in just about every way, if you drive your car like a diesel then yes the 8v is better but for anyone after somn epower the 16v is still a superb piece of kit.

Nothing wrong with the 8v though but it is just not an mi

Cheers
Luke