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Discussion Starter · #1 ·
Anyone know what was changed to cause the horsepower ratings to go up in 2003? Both LT and HT were higher 6 and 9 HP, respectively.
 

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Probably changes to software. Or Volvo just decided to publish different numbers for some reason.
 

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I think it is a software change that boosted the power, I think they increased the power in the R models for those years also. I wonder if the changed the fuel economy estimates? Volvo might have increased the horse power figures because the other vehicles in the luxury convertible class might have increased their horse power numbers so Volvo might have had to follow suit to stay competitive.
 

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Discussion Starter · #4 ·
Two hardware items I know of:

1) Throttle (ETM). Don't know if it got bigger, just went away from the Marelli with the contacting sensor.
2) Exhaust manifold. Said to flow better (see Deja Vu thread).
 
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