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Old 12-20-2017, 12:08 PM   #52 (permalink)
COcyclist
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Join Date: Dec 2007
Location: NW Colo
Posts: 738

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 52.55 mpg (US)
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Quote:
Originally Posted by MetroMPG View Post
Discuss...

What stands out as the most notable efficiency-related changes in your automotive world in the last decade?
I see aerodynamic improvements, more efficient drivetrains and the proliferation of EVs as very notable changes in the last ten years. Many of these are similar to what Ecomodder members have been experimenting with in their own garages and detailing in posts on this website. Sometimes it feels like the big auto manufacturers are listening in. Fastback rooflines are becoming cool again.

We recently traded our 07 Grand Cherokee CRD and 11 A3 TDI for a 2017 Audi Q5 3.0T. The Q5 has a roofline that follows the "template", belly pans producing an almost totally flat undercarriage and an eight speed DSG transmission. I could only get about 24 mpg from the CRD turbo diesel on the highway, which I figured was pretty good for a heavy, four wheel drive vehicle. However, even with a gasoline supercharged three liter V6 the Q5 has been returning 30 mpg on the highway at 60 mph for a similar size, weight, towing capacity and all wheel drive. Amazing.

I have enjoyed being part of the Ecomodder community and have learned a great deal. Keep up the good work. I am looking forward to many more decades of innovation.
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https://ecomodder.com/forum/showthre...tml#post621801


Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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Daox (12-20-2017), MetroMPG (12-20-2017)