As for what exactly those improvements are, your guess is as good as ours. As we reported before, Polestar – the tuning firm that now offers power upgrades for the current range of Volvo products – is said to be handling the more potent S60, with horsepower slated to be somewhere in the 350 to 400 range. Volvo could use a version of the Yamaha-sourced V8 from the XC90, but in this day and age, a boosted version of the turbocharged inline-six sounds more realistic.
Of course, a hotter S60 will need more than just power to make it truly competitive with the likes of the BMW M3 and Mercedes-Benz C63 AMG. We're sure that Polestar has many a trick up its sleeve, and we're indeed interested to see how the whole project pans out. Stay tuned.