New V6 engine for the 2012 Buick LaCrosse image

General Motors said today that the 2012 Buick LaCrosse will be available with a new more powerful and fuel-efficient version of its direct-injected 3.6L V-6 engine.

The engine is a no-additional-cost alternative on select trim levels to the standard 2.4L four-cylinder engine with eAssist.

This new 3.2 liter V6 engine will offer 303 horsepower (223 kW) on the front-wheel-drive LaCrosse – an increase of 23 hp (17 kW) – and 264 lb.-ft. (358 Nm) of torque with no loss in fuel efficiency (17 mpg city / 27 highway). An all-wheel-drive version, which is yet to be rated, also will be available.

According to GM, The new V-6 uses several lighter-weight components that help maintain LaCrosse’s fuel efficiency while boosting its horsepower. The new integrated cylinder head/exhaust manifold design saves about 13 pounds compared to the cylinder heads and manifolds of the previous engine, while the new composite intake manifold saves about 5.5 pounds.
Additionally, a light-weight structural front cover and lightweight, high-strength connecting rods bring the total weight savings to 20.5 pounds, improving fuel efficiency and enhancing the feeling of driving balance.

“Thanks to increased use of lightweight components and other enhancements, the new 3.6L V-6 offers 2012 LaCrosse buyers improved acceleration with no hit to fuel efficiency,” said Doug Osterhoff, LaCrosse product marketing manager. “This new engine is an attractive option on the car that’s been widely hailed as one of the most attractive luxury sedans on the road today.”