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Former Commerce and Transportation Secretary Norman Mineta urges technology neutral policies in reaching proposed CAFE standards

Green Car Congress

Mineta cited a 2008 well-to-wheel comparison of different vehicle technologies by the MIT Electric Vehicle Team that ranked electric vehicles, diesel and turbocharged gasoline engine vehicles within a 10–15% performance band. Impact of different sales mix on new car average fuel economy.

Standards 247
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Downspeeding and supercharging with transmission optimization can deliver fuel economy improvement over downspeeding and turbocharging

Green Car Congress

Engine downsizing and downspeeding are two strategies that can be applied to gasoline and diesel engines to improve vehicle fuel economy. They performed fuel economy and 0-60 mpg acceleration simulations for three shift schedule optimization strategies for 81 transmission gear ratio configurations of the supercharged configuration.