The new V8's 311 horsepower and 325 lb.-ft. of torque are routed through an all-new six-speed automatic transmission. From there, power is distributed to all four wheels by a standard all-wheel-drive system that's been upgraded to handle the additional power of the V8 engine.

The AWD system also features a new "Instant Traction" design that automatically transfers power to the wheels with the best grip even more quickly than the previous generation. Like most AWD systems, however, this set-up is designed more to provide added peace-of-mind in inclement weather than it is to tackle serious off-road excursions.

The new drivetrain package gives this sophisticated SUV a healthy kick in the pants. Volvo claims the XC90 V8 will accelerate from 0-60 mph in a very respectable 7 seconds - about 1.5 seconds quicker than the six-cylinder T6. Maximum towing capacity remains unchanged at 5,000 pounds, though it's safe to assume the V8's added torque would allow it to pull that load with a good bit more authority.

All those SUV lovers with a vaguely guilty conscience will also be glad to know the new motor is the cleanest eight-cylinder engine ever offered in an sport-ute. Using four catalytic converters and adjustments to idle speed and air-fuel ratios, the new Volvo V8 earns an impressive ULEV II certification from the Environmental Protection Agency, a rating no other V8 powerplant has achieved. Even fuel economy is reasonable -Volvo estimates 17 mpg city/20 mpg highway - though the engine does require pricey premium fuel.