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Report: Gasoline engine has big bang for the fuel-economy buck

A government report says improving the gasoline engine will yield huge gains for the consumer and the environment as automakers consider ways to improve fuel economy over the next 14 years. The Obama administration's technical assessment looked at four technology scenarios by which automakers might attain suggested CAFE goals of 47 to 62 mpg for cars and light trucks by 2025. The scenarios differed by the portion of an automaker's fleet that was accounted for by electrics, hybrid electrics and plug-in hybrid electrics.

New Range Rover & 2014 Range Rover Sport diesel hybrid at Frankfurt 2013

But Land Rover did tell us the 4.4 litre TDV8 will be joining the range later in the year and that a diesel-electric hybrid would be on offer too. And now we know that the diesel hybrid Range Rover Sport – and a Range Rover Hybrid – will both debut at the Frankfurt Motor Show in September. Stuart Frith, LR’s head programme engineer for the new RRS, has confirmed to Car Sales in Australia that the hybrid Range Rover and Sport will arrive in September – as will the TDV8 RRS – but that the 2.0 litre EcoBoost petrol engine for the RRS is still a way off, even though Land Rover are already running it and believe it still offers all a real Range Rover Sport should.

Chevrolet touts Corvette 427 convertible with race driver Tommy Milner

The 2013 Chevrolet Corvette 427 convertible doesn't need any hype--the 505-hp V8, a 0-to-60-mph time of 3.8 seconds and a top speed in excess of 190 mph make a strong statement. Nonetheless, Chevrolet has enlisted the help of Corvette Racing driver Tommy Milner in a trio of 90-second videos to tout the 427 convertible. In our favorite, Milner talks about the car's aerodynamics, including the optional carbon-fiber splitter, that help keep the car glued to the ground for better control.