Audi RS4WHAT: Audi's ultimate A4 has a 4.2-liter, direct-injection, 420-hp V-8 that outmuscles the next BMW M3 (400 hp) and Mercedes C55 AMG (390 hp). Six-speed stick only. WHEN: Breaks cover at this month's Geneva show. HAULING: One-ups M-B and BMW
The 2006 STS-V, due this fall, will be the second V-series Cadillac, after the smaller CTS-V. Since the STS is Cadillac's flagship, a supercharged version of the silky Northstar V-8 was deemed more appropriate than the raucous Corvette V-8 used in the CTS-V. T
The 2008 STS gets GM's direct-injection V6 making 302 horsepower. It also adds new tech like active steering and lane-departure alert.