This Volvo C30 T5 Polestar is the sensible, production-ready one: essentially a C30 T5, often in R-Design form, with dealer-installed Polestar ECU remap, rather than the wild blue 405bhp AWD concept car. The official Polestar product sheet for a C30 lists the upgrade from 227 hp to 250 hp, with torque rising from 236 lb-ft…