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Originally Posted by cRiPpLe_rOoStEr
But now, considering a Prius and a comparably-sized turbodiesel compact car
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Would be a much better ... it would at least have a chance ... instead of the outdated 7,700 aerodynamic brick beast you tried to use previously.
Quote:
Originally Posted by cRiPpLe_rOoStEr
rated at the same mileage as the Prius
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MPG is not whole pollution picture.
As long as the discussion is about pollution ... you need to compare the tail pipe pollutants emitted ... not just MPG ... Some higher MPG vehicles actually produce more tail pipe pollution.
The ULEV rated MT LB Gen-1 Insight is just such an example ... it produces more toxic pollutants out it's tail pipe per mile ... than the SULEV rated CVT Gen-1 Insight does ... even though the CVT gets less MPG , it pollutes less per mile.
Quote:
Originally Posted by cRiPpLe_rOoStEr
Then, considering both the Prius and the Opel Astra running on pure ethanol, altough the Astra would use 40% more fuel for the same mileage the cost difference would still be favorable to it in a 160,000-mile expected life cycle.
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Cost can be a 100% valid reason to buy a car.
But it does not change the pollution coming out the tail pipe... This entire thread is about the pollution or green-ness , not the cost effectiveness.
Quote:
Originally Posted by cRiPpLe_rOoStEr
But it could also be set to run on other alternative fuels such as biodiesel and even straight vegetable oil or waste vegetable oil, which wouldn't decrease the mileage so much as ethanol does.
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As was already pointed out , by you ... both vehicles could be run on bio-fuel ... thus it changes nothing for the pollution comparison.
Quote:
Originally Posted by cRiPpLe_rOoStEr
Regarding emissions per gallon, current Diesels were highly improved for that matter.
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And that is 100% a good thing... much better for pollution , than the previously suggested several decade outdated diesel options.
But is it enough? ... You need to compare a diesel that gets ... to the same low tail pipe pollution rates ... PZEV operating exhaust rating... or the diesel is still polluting more per mile , every mile it is driven.
As long as it pollutes more per mile ... it is only a question of how many miles before the Diesel is a net of more pollution / less-green option.