The automatic, though smooth and responsive enough in sedate driving, is a cog short of its competition and responds too slowly in aggressive driving. Both engines are smooth, sweet-sounding, and responsive, but the Super Handling All-Wheel Drive (SH-AWD) system, with the more powerful 3.7-liter V-6, brings out the sport-sedan character in the TL. Working together with the stability control system and allocating torque not only front-to-back but left-to-right, the SH-AWD system is ideally suited to spirited driving and quick emergency maneuvers on the road. Even on rough-surfaced, rain-slicked pavement, we found the TL almost impossible to fluster.
There's a lot to like in the TL's electric power steering, too. At parking-lot and city speeds it feels light and responsive, returning to center promptly out of corners, with a nice natural feel on center. Up at highway speeds it gathers more heft, but whether slow or fast, the steering manages to transmit some information from the road surface.
The 2010 Acura TL SH-AWD is powered by a 3.7-liter V-6, making 305 horsepower and 273 pound-feet of torque; but that peak torque doesn't happen until 5,000 rpm; the engine doesn't have surprising gobs of low-range torque like BMW's twin-turbo six, and it doesn't quite whirl itself into the heavy-breathing frenzy of the Infiniti G37's V-6. But overall, it's a solid performer in the mid- to upper-rev ranges—and much better-suited to the manual transmission than we remember it being with the six-speed automatic. You'll find excellent passing ability but it sometimes requires downshifting two, even three, gears to make the best dash; but fortunately the shift action is nice and neat.
With the manual transmission, the 3,889-pound TL SH-AWD can get to 60 mph in the mid five-second range. That's a slight bit slower than the G37 but a bit faster than the automatic TL.