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Vintage diesel Mercedes-Benz E-Class wagon drifting – Click above to watch the video after the jump

Given that the traditional four-stroke Otto-cycle engine piston engine only has a thermal efficiency of 25-30 percent, there is clearly still plenty of room for improvement. While most of the green automobile attention in recent years has been focused on electrification, liquid fuels still have about 100 times the energy density of today's best lithium-ion batteries, a difference that probably won't change significantly any time in the near future.

Widebody Honda CR-Z Prototype – Click above for high-res image gallery

Kia Forte EcoDynamics LPI Hybrid – Click above for high-res image gallery

The packs a compelling combination of unique styling, turbocharged power and a Generation Y-approved interior. But can you get past its looks?

Roush 2011 Mustang 5.0 ROUSHcharger - Click above for high-res image

Volkswagen Up! spy shots – Click above for high-res image gallery

Jack Pitney, BMW's North American vice president of marketing was killed today in a tragic accident while vacationing on his farm.

2011 Volkswagen Touareg – Click above for high-res image gallery

The EVTV team has recently finished electrifying their sweet '57 Porsche 356A Speedster replica and will soon be sending it off to their "roller" supplier, Special Editions Inc., for further testing and inspection. With that project in the can, they are ready to try something new. The projects that they have undertaken to date have been relatively expensive – $50,000 and up – and so it has been decided that the next vehicle to be lavished with batteries and an electric motor will be

Lotus Evora S and Evora IPS – Click above for high-res image gallery

Todd Schnitt with his Chevrolet Corvette ZR1 – Click above for high-res image gallery

Ford Focus EV - Click above for high-res image gallery

Hyundai RB Concept – Click above for high-res image gallery

Lamborghini Reventón R/C Car – Click above for image gallery

Zero Carbonista's all-electric Nemesis acquired its name early last year, was legalized for on-road use last spring and underwent a "general shakedown" test late last summer. Of course, it's hard to forget that the so-called wind car also took out a few hedges when Ecotricity founder Dale Vince mistakenly stepped on the wrong pedal during some testing.

Volkswagen Up! spy shots – Click above for high-res image gallery

Brabus iBusiness – Click above for high-res image gallery

Back when a greenhouse was a structure used to grow plants in cold weather, an oil pump was just a non-descript but necessary device to keep metal engine parts well lubricated. As engineers work to meet the 35.5 mile per gallon Corporate Average Fuel Economy (CAFE) standard, the lowly oil pump has become one of many places where they can find incremental improvements in efficiency.

2005-2008 Toyota Corolla/Matrix – Click above for high-res image gallery

Garmin has recalled a total of 1.25 million portable GPS units for a possible fire risk, with 796,000 of those sold here in the United States. According to Consumer Reports, the problem stems from a faulty battery that may cause the device to overheat while in use. So far, there have been no injuries or property damage due to the defect, and fewer than 10 units have been reported with the problem.

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