(The roadster’s power figures were slightly lower primarily due to differences in the intake and ... supercharged Cadillac 4.4-liter Northstar V-8, unique to the 2006-’09 STS-V and XLR-V ...

The next car to get V'ed will be the larger STS sedan, already a fine handler, and with the serious incoming power upgrades, a potential real competitor for the new V10 BMW M5.