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Robert Hurst is the author of The Art of [Urban] Cycling, Road Biking Colorado, Hiking Through History Colorado, The Art of Mountain Biking: Singletrack Skills for All Riders, The Cyclist’s Manifesto, Best Easy Bike Rides Denver, Best Bike Rides Denver and Boulder, Road Biking Colorado’s Front Range, Mountain Biking Colorado’s San Juan Mountains: Durango and Telluride, and The Bicycle Commuter’s Handbook.

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January 12, 2012, 08:38
Filed under: Uncategorized | Tags: efficiency, horsepower, Knittel, mpg, vehicle weight

From a paper by Christopher Knittel in American Economic Review (pdf).

http://web.mit.edu/newsoffice/2011/cars-on-steroids-0104.html

click to enlarge

Since 1980, horsepower has more than doubled, and average weight has gone way up, so mpg gains have been largely canceled.

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