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Along with the larger displacement, which has become vital in the increasingly competitive compact-car segment, the 2.4-liter for the first time brings variable valve timing to the Ecotec modular engine family.

Specs for the 4-speed automatic transmission used in the L-Series.

General Motors Powertrain engineers are working on a gasoline engine that operates like a diesel. The engine has an ignition system with spark plugs, but once it warms up, the engine runs without using the plugs to ignite the fuel-air mixture in the cylinders.

GM engineers developed the belt alternator starter system (BAS) to provide improved fuel economy in stop-and-go driving by shutting the engine off at idle mode and by enabling early fuel cutoff to the engine during decelerations.

Birth of the ultimate import fighter?

Pictures of the Ecotec and CVT at the NY Auto Show.

General Motors recently demonstrated to automotive journalists a host of advanced powertrain technologies it is developing to both reduce emissions and improve the efficiency and performance of its internal combustion engines, automatic transmissions and hybrid systems.

Imagine a vehicle that can give you sports car performance, better fuel economy, unrivaled ride and handling, and enhanced vehicle safety simultaneously.

GM Powertrain represents a global network to design, develop, integrate and build powertrains for General Motors worldwide. GM Powertrain products are grouped under the following headings: transmissions, engines, castings, and components.

GM Powertrain's Ecotec inline four-cylinder engine family – GM’s first truly "global" engine design when it was launched in 2000 – adds a new, larger-displacement 2.4-liter variant for 2005, as well as significant new technology upgrades that make the modular Ecotec engines class leaders in terms of power, torque and refinement.

General Motors' heavy investments in powertrain technology are beginning to pay off in terms of better fuel economy. GM is slowly building its hybrid business and will launch one new hybrid per quarter for the next four years. The company has just opened an advanced powertrain testing laboratory in suburban Detroit. The automaker is rolling out engine technologies that maintain performance while lowering emissions and fuel use. GM has been adding gears to automatic transmissions, reducing the we...

The ION Red Line's supercharged powerplant was recently called one of the "10 Best Engines" for 2006.

The internal combustion motor is, in some respects, simple. As pistons move downward, they draw air into the combustion chamber. The fuel system combines this air with gasoline (or other combustible hydrocarbon-based petroleum products).

GM's new Hydra-Matic 6T70 six-speed automatic transmission will debut in the all-new 2007 AURA.

Advanced combustion technology improves power and efficiency in the 2007 Saturn SKY Red Line.