Increasing displacement is perhaps the most-proven technique to improve horsepower and torque, and thatвЂ™s where GM Powertrain engineers started when developing the Ecotec 2.4-liter. Intelligent Technology as Important as Cubic Inches The new Ecotec 2.4-liter engine's torque-rich power delivery and its designed-in refinement deliver a driving experience that will please both performance-oriented buyers and those simply seeking a more sophisticated feel from a compact-car powertrain. вЂ“ for a 2.4-liter normally aspirated four-cylinder in the United States And the Ecotec 2.4-liter's 170 horsepower at 6000 rpm also is one of the highest specific-power outputs for any non-boosted four-cylinder of any size sold in the U.S., according to Ward's 2003 market data. The combination of slightly more displacement and variable valve timing enables the Ecotec 2.4-liter to achieve one of the highest torque ratings вЂ“ an estimated 170 lb.-ft. That sort of responsiveness enormously enhances engine response.' 'For the new Ecotec, variable valve timing helps deliver 90 percent of the torque peak at as low as 2400 rpm.

'We have added technology to improve low-end torque and continue to reduce emissions,' said Jay Subhedar, Ecotec global four-cylinder engine assistant chief engineer.

But 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. GM Powertrain's new Ecotec 2.4-liter four-cylinder engine, slightly modifies that well-used adage, 'ThereвЂ™s no substitute for cubic inches.' In the case of this slightly larger version of the original Ecotec 2.2-liter, one of GM's highest-volume engine families, there are a few more cubic inches found in the new 2.4-liter variant.

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