
the GDCI engine in development uses a supercharger for "low exhaust gas temperatures" and then a turbocharger for "high-speed power." Combined with an extremely high compression ratio – 14.8:1 – as well as a fully variable valvetrain, Hyundai expects a 1.8-liter GDCI engine to be more efficient than a comparable 2.0-liter diesel engine with similar performance.
"Gasoline is possibly the best fuel for diesel engines," Engineer said. Adding to that, John Juriga from Hyundai's powertrain engineering team told us that the target here is to "beat diesel" in terms of cost to the consumer. Flat out, Juriga said that diesels "don't make economical sense to the consumer," and that this GDCI engine will offer the fuel efficiency and performance benefits of diesel without the added price premium. With a current redline of only 4,500 rpm, it also appears like it will behave like a diesel, if not sound like one, though Hyundai tells us it "can soften the noise with injection timing."
This new GDCI engine is being developed with the help of Delphi, and while official production timing hasn't been released,
http://www.autoblog.com/2013/11/15/hyun ... an-diesel/
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