the turbo will only be full boost it you have the throttle wide open. The IS220D and the Avensis 2.2D use the same engine, a 2.2l D4D.
Has anybody been on TOC, do the Avensis 2.2 owners also get poor mpg?
I was told by lexus that the engine in the IS220d is not the same as the one in the Avensis, but a completley new engine design for the lexus, made of aluminium.
If you look at the figures the BHP, Torque and fuel ecconemy is a lot better on the IS220D