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Chevrolet unveils new Ecotec 2.5L engine

ABR Staff Writer Published 20 September 2011

Chevrolet, a division of General Motors, has unveiled details of the new Ecotec 2.5L four-cylinder engine, which will be debuting in the 2013 Malibu.

The company said that the new Ecotec 2.5L engine will be more efficient, refined and powerful than the current Ecotec 2.4L.

The 2.5L engine is expected to deliver 190 horsepower (140 kW) and 180 lb.-ft. of torque (250 Nm), making about 12% more horsepower and 16% more torque than the current Ecotec 2.4L, it is also expected to achieve 30 mpg on highway.

GM has focused on increasing efficiency of the new engine by reducing engine friction and designing a new combustion system with a higher compression ratio.

The new combustion system features improved knock resistance and higher-flowing intake and exhaust ports in the cylinder head to increase efficiency, power and torque.

The new 2.5L engine also features a direct-injection fuel system, dual overhead camshafts, variable valve timing, electronic throttle control and pistons with jet-spray oil cooling.

GM global chief engineer Mike Anderson said the noise intensity is 40% less than the company's 2.4L direct-injected engine.

"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," Anderson said.

The company said that the new 2.5L engine will be available as the standard engine in the 2013 Malibu when the car goes on sale next summer.