Chevrolet released information on its all-new Ecotec 2.5-liter four-cylinder engine today. The new engine will replace the current Ecotec 2.4-liter when it debuts in the 2013 Malibu next summer. The automaker says the new engine will be more efficient, refined, and powerful than the outgoing engine.
Chevy says the new engine will make about 12 percent more horsepower and 16 percent more torque than the existing engine for a total of 190 horsepower and 180 lb-ft of torque. The new engine is also expected to achieve 30 miles per gallon on the highway when official testing is completed.
GM focused on increasing efficiency of the new engine by reducing engine friction and designing a new combustion system with a higher compression ratio. Friction was reduced by an average of 16 percent across the operating range through the use of a variable-displacement oil pump and an actively controlled thermostat. The redesigned combustion chamber combined with higher-flowing intake and exhaust ports reduce engine knock while increasing efficiency, as well as power and torque.
The new 2.5-liter carries over many technologies from the current generation of Ecotec engines such as direct-injection, dual overhead camshafts, variable valve timing, electronic throttle control, and pistons with jet-spray oil cooling.
“The noise intensity is 40 percent less than our 2.4L direct-injected engine, which was named one of Ward’s 10 Best Engines,” said Mike Anderson, global chief engineer, in a press release. “Engineers also tuned the 2.5L to deliver more of its torque at lower rpm, giving the Malibu a stronger feel at launch and during on-demand maneuvers, such as passing or accelerating on a freeway entrance ramp.”
The new engine will launch in our market as the base engine in the 2013 Chevy Malibu when the car goes on sale next summer. Production of the engine should commence shortly before that at GM’s Powertrain assembly plant in Tonawanda, New York.