If you have your D5 engine "Optimised" does it come with the "Over Boost" or is this something new? I copied the text below from the Volvo Polestar site.
D5 Over Boost
The Polestar Optimisation software for the D5 (68) engine offers an exciting enhancement. Polestar have introduced an “Over boost” function that provides an additional +20nm Torque and +15hp power for up to 20 seconds once the peak power of the engine has been reached. This additional power and torque is over and above the already increased output figures that the Optimisation provides so you get an impressive boost when you need it most. The standard D5 (68) engine produces 235hp and 480nm torque. When this engine is Optimised and is in Over boost mode, the figures are increased to 255hp and 520nm torque.
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2010 XC70 SE Lux 205bhp D5 Auto Seashell
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