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GM reveals new, highly modular Ecotec engine family

GM introduced its new modular family of Ecotec engines on Wednesday at its powertrain headquarters in Pontiac, Mich. The new, reduced-in-size three- and four-cylinder mills will replace three of GM's current engine families, eventually making their way into five of the company's brands. The Ecotec family will eventually spawn 11 engines in total, ranging in displacement from 1.0 liter to 1.5 liters.

Renault/Lovegrove Studio Twin'Z concept

The Renault Twin'Z concept is a collaborative project with British designer Ross Lovegrove, filling the fifth stage in Laurens van den Acker's 'lifecycle' – Play. It's currently on display at the Milan Salone. Essentially previewing the all-new, rear-engined Twingo co-developed with Daimler, the Twin'Z takes this relatively humble city car and, thanks to the input of Lovegrove, it appears to have taken on an organic nature, which shouldn't be unexpected to those familiar with his work.

Mazda's rotary engine stalled, not forgotten

Development of the next-generation rotary engine from Mazda Motor Corp., first unveiled three years ago, is making slow progress despite missing emissions targets. A top Mazda powertrain executive said today that the 1.6-liter rotary engine, called the 16X, is about 30 percent more fuel-efficient than the current rotary engine used in the RX-8 sporty car. In fact, the 16X so far performs slightly better than Mazda's standard two-liter gasoline engine, said Mitsuo Hitomi, general manager of the Japanese carmaker's powertrain division.