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Illustrated: fuel consumption at higher speeds

via Green Car Congress:

Quote:

The editors at the German weekly Auto Bild recently ... published ... a head-to-head comparison of the fuel consumption of 16 different models of cars under higher speed driving conditions.

The editors measured fuel consumption using on-board computers at speeds of 80, 100, 130, 150, 180, 200, 220, 250 km/h and at top speed.

http://bioage.typepad.com/photos/unc.../autobild1.png

Quote:

Adding a rooftop bicycle carrier to the BMW 530i Touring model increased fuel consumption by 11% at 100 km/h (62 mph). That gap increased to 26% at 180 km/h (112 mph).

Your grain of salt: if you read the numerous replies in the comments at GCC, you'll see quite a few Prius owners contesting the FE stats as presented in the article.