MtillingVolvo posted this file on another thread for the XC90;
volvo-xc90-my20-edition-2.pdf
Which shows the MY20 XC90 changes.
Be handy if someone had the XC60 version, quite interested in the Polestar Engineered version!
Maybe that's how they get to the 420hp they list for the T8 when all the others just say 303+87=390hp. Even with Polestar software that's not coming in above 405
I guess in some markets where the T8/T6 engine isn't restricted due to emissions it still hits 320hp, so I guess that + Polestar to 334 + the electric 87 gives you 421 so maybe that's where they're getting the magic figure from, don't know.