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Old 09-28-2009, 01:20 PM   #1
AVANTI R5
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Default HEMI Most Eco-Friendly Engine In A Half-Ton

[quote]


Quote:
Now that we’ve got that out of the way, what about the “greenies” who need a pickup but want one that’s eco-friendly? Some would say that there’s no such thing, but we disagree. Using federal fuel economy and carbon footprint data provided by the EPA, we’ve put together a list of the most eco-friendly pickup trucks. Before we give you the rankings, here’s the methodology:
  • We’re looking at more than just total carbon footprint – aka the total tons of carbon a vehicle produces. While the total footprint figure is important, it’s important to qualify the total footprint against the power of the vehicle.
  • We did not use any manufacturer towing figures because we believe all half-ton tow ratings are inflated. We didn’t use payload ratings because they’re just as dependent of suspension as they are on engine power. We kept it simple and looked at SAE standard torque, horsepower, and published displacement only.
  • All of our footprint numbers are based on the annual EPA data for the 4×4 versions of the trucks…we wanted to maximize the total carbon footprint number of every vehicle.
  • We ignored E85 because most people don’t use it. We also ignored V6’s because very few people buy them in a half-ton truck.
If you think our methodology is flawed, feel free to publish your own article. We’re making some arbitrary choices here to try and get these numbers under control – deal with it.
Here’s the total annual carbon footprint data (sorted by annual CO2 output):


go to link
http://www.tundraheadquarters.com/bl...truck-engines/


The Dodge 5.7 is the best compromise between power and carbon efficiency.
The Dodge Ram with the 5.7 is one of the most powerful engines on the truck market, yet the EPA annual carbon footprint is less than the Tundra 5.7, Titan 5.6, and Silverado 6.2 (despite very similar HP and TQ numbers). It might sound crazy, but the HEMI might be the best compromise between power and low carbon output.
Second Place: How about a three way tie?
The Silverado 5.3, F150 4.6 3V, and new Tundra 4.6 are all powerful V8’s with solid performance and the lowest carbon output in the group. Unless you need maximum power, any one of these truck engines will suit you just fine.
Third Place: Chevy Silverado Hybrid
Ya, that’s right, the hybrid came in third. Considering that the Ram (which is substantially more powerful) produces the same amount of carbon on an annual basis, there’s no way the Silverado Hybrid could rank first. Since all the engines in second place produce less carbon annually and have similar power, the hybrid is the obvious third choice.
This is yet another example of marketing getting in the way of science. Chevy’s own 5.3 (based largely on 1960’s pushrod technology) nearly matches the Hybrid 6.0 in terms of horsepower and torque per ton of carbon. What’s the point of the hybrid?
Least Eco-Friendly Half-Ton Engine: Of all the V8s, Ford’s soon-to-be-discontinued 4.6L with 2 valves per cylinder has the least efficient HP and TQ per ton of CO2 numbers. It’s also the least efficient in terms of tons of CO2 per liter of displacement. Ford’s getting rid of that engine to make room for the new EcoBoost, which will likely rock these ratings.
Bottom Line: Give Dodge credit – they integrated a number of fuel-saving technologies into their most powerful engine, and the result is a truck that is environmentally efficient – at least as far as trucks are concerned.





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Old 09-28-2009, 01:31 PM   #2
im2lazy789
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link to source??
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Old 09-28-2009, 01:35 PM   #3
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^^
It is in the middle of the article


Here’s the total annual carbon footprint data (sorted by annual CO2 output):


go to link
http://www.tundraheadquarters.com/bl...truck-engines/
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Old 09-28-2009, 02:10 PM   #4
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That's a bit like the most pleasant STD.

The methodology is flawed too. CO2 is really just a different way to measure fuel economy (burning 1 gallon of gas produces a fixed amount of CO2), and an engine that makes twice as much power doesn't necessarily consume twice as much fuel. They do the same work in the test cycle after all.

In fact if you used the same method to rate all cars, the Veyron would be the greenest (not kidding).
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Old 09-28-2009, 03:23 PM   #5
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Looking at the projected CO2 #s on fueleconomy.gov the 5.7L Ram is just as offensive as the Silverado and Tundra. With the new 4.6L Tundra producing the next least amount of CO2 and the Silverado hybrid producing the least.
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Old 09-28-2009, 06:40 PM   #6
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Why isn't the F-150 even mentioned? 21/mpg on the highway... Best selling truck in America too.
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Old 09-29-2009, 02:52 AM   #7
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Quote:
Originally Posted by 1sicWRX View Post
Why isn't the F-150 even mentioned? 21/mpg on the highway... Best selling truck in America too.

Second Place: How about a three way tie?
The Silverado 5.3, F150 4.6 3V, and new Tundra 4.6 are all powerful V8’s with solid performance and the lowest carbon output in the group.
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Old 09-29-2009, 08:17 AM   #8
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^^Also

EcoBoost engine confirmed for the Ford F-150 in late 2010



Ford’s news about its EcoBoost engine for the F-150 was overshadowed by the introduction of the latest Super Duty models so let us expound on that a bit. Ford didn’t reveal many details about the new turbocharged, direct injection mill. The 3.5-liter V6 engine is similar to what was used in Ford’s front-wheel drive models.

However, it was modified to accommodate a rear-wheel drive layout. Ford explained that its EcoBoost technology was optimized for truck applications, meaning there should be tons of torque with a peak that starts at the lower end of the rpm scale and continues on through the midrange. With regards to fuel economy, Ford said that the EcoBoost engine will have a 20% improvement. Carbon emissions are also reduced compared to a similarly powerful naturally aspirated engine.
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