2015 VW Golf TDI = 65 mpg!

What MPG scale is your source using? Do you have a link?

Lacking a concrete link, I'd hazard to guess that it is likely a European scale, which will drop significantly when translated in the future to EPA scale. Remember that the Prius is already over 60 mpg on combined Euro scale (US gallons), or 72 mpg (Imperial gallons).

 

Toyota's old Prius does 72 UK MPG or 60 US MPG combined:

Select a search : Directgov - Car fuel data, CO2 and vehicle tax tools


Of course this is not EPA but NEDC. Text says that numbers are "according to VW", they didn't even make EPA test whit it and they are talking bullshit. The greatest and latest Europe bluemotion 1.6 TDI, that will probably never be available in US (only 105 HP), gets a remarkable 42 MPG in real life and this is EURO5 emission with higher NOx emissions than US:
Übersicht: Volkswagen - Golf - Spritmonitor.de

If you can avoid city traffic diesels can beat the Prius, but in real life it's really hard to find such a daily commute.

In real life diesels maybe beat the EPA, but those are just not the EPA numbers, but something that VW made up.

 

When VW and TDI engine are involved, not only Miles per Gallon are accounted...
Consider also other indicators: Miles per Gearbox, and Miles per Turbos

 

Can you give us a link to your sources?
Are they using US gallons?
Are they using EPA tests?

As others have pointed out, the current Prius can be shown to get 89 mpg if you just choose the right test. (or 140 mpg if you choose the right Prius) Just think what you could do with a Japanese test using English gallons!

Toyota Prius - Wikipedia, the free encyclopedia

 

Hi James,

When we see a consistent pattern of 'over promise' followed by 'under deliver,' there comes a time when like the "Boy who cried wolf" you realize that might not be a credible source. Since 2006 and beyond, we have consistently seen inflated diesel claims that in 'the real world' don't pan out.

When I was younger, I used to take the diesel claims at face value and look at the empirical data. But time and time again, reality has a Prius bias. For example, from June 2009:

This dates from a time when similar TDI claims were being made that they were just as good as the Prius. So we looked at real world user reports and found . . . it ain't so. And this was the Gen II Prius.

So I'm going to suggest copy-and-paste of an inflated diesel claim does not make it so any more than Ford discovered with their C-MAX "47 MPG." In fact, it means Ford has lost credibility as a company and even worse for their sales forces in the field.

Recently Land Rover made some incredible claims about their diesel-hybrid Range Rover. My posting of their announcement was more to setup an engineering model showing the only way their claims could be true would be "Nobel Prize" winning defeat of the laws of physics, much less engineering.

I don't fault anyone for thinking this might be news but consider the source. A healthy dose of skepticism is called for or at least some technical details showing how:


Thanks,
Bob Wilson

 

The OP headline is a troll.

 

And it'll be a manual.

 

dang, that's an ugly car.

 

There are two issues in my mind when it comes to VW diesels:

1) They have a remarkably poor reliability record, particularly for the high-pressure diesel fuel injector system. When the pumps die, they frag the rest of the fuel system, leading to a complete replacement. See

Are Fuel Pump Failures Sidelining Volkswagen's Diesel Engines?

2) They are achieving the necessary EPA emissions limits using a diesel soot reburner in the exhaust system that gradually fills with ash over time. Around 120,000 miles it has to be replaced at considerable cost (several thousand dollars). See VW Audi DPF filter regeneration with DPF problems like clogging and why you can't do a DPF bypass or DPF delete with a kit.

 

This has been my biggest concern about getting a TDI, Golf or Audi. Heard a lot about the HPFP failures in US spec TDIs, maybe the quality of DF2 in the States, and I also have heavy city driving commutes, which don't gel well with diesels, but seem perfect for parallel hybrids like Toyota's.


iPhone ? - now Free

 

It's not just US spec TDI's. The fuel pumps and the particle filters are significant issues here in Europe and have been for years. It's a known problem. The UK VW website even has a section in the FAQs suggesting not to purchase a diesel if you do lots of town driving;

FAQs - Environment : Volkswagen UK

....the servicing requirements are the same as for cars without DPFs. The only additional component that would need replacement is the DPF itself. However, the life expectancy of a DPF is around 100,000 miles, which is similar to that of a petrol catalyst or exhaust silencer.

If your typical driving profile involves short trips in heavy traffic, you may wish to reconsider your choice of a car, and may prefer to choose one with a small petrol engine instead.

 

I read in the USA Today several days ago that diesel car sales in the USA are going to surge. We have had three VW diesels: 1980 VW Rabbit, 1999 NewBeetle, and our current, 2006 New Beetle. I had the 1980 Rabbit for about five years and sold with about 105,000 miles. No real issues, for a converted gas engine. The 1999 NewBeetle, had plenty of starting problems and CELs. Traded for the 2006 with about 95,000 miles. Our 2006 is seven years old and has been problem free with approximately 50,000 miles. The 1999 got the best fuel mileage, at least six hundred miles per tank, every tank. I'd rather go hybrid than diesel from now on. I'm really tired of paying top dollar for diesel fuel.

 

Yup. I looked at Tdiclub and VWVortex and saw those repair estimates at under 100k and said no thanks to a Golf or A3 TDI. Never mind the usual VW "quirks" (so say the enthusiasts..others just call them "problems").

 

In my household, that counts as a positive feature.

 

i wish it was true

but you are not comprehending the numbers right....

 

Here are the only 2 metrics you need to know w./ respect to what the Prius can/will do:

First, diesel is, and will continue to be -due to global demand- more expensive than regular gasoline. At LEAST 10% more.

So, just as one uses a 'GDP deflator' when factoring inflation, so too we must create a new metric for all Diesel TDI mileage claims.

We shall call it the "DIESEL DEFLATOR"

And it works like this: every time the diesel crowd makes wild-eyed exaggerations and claims w./ regard to highway mpg, we must bring them back to earth by using the Diesel Deflator. (DD)

It is very simple. Just take whatever rationale one has for maxing mpg - be it less foreign oil, lower carbon footprint, or simply saving $ at the pump.

Then simply take 1 + the % higher content of diesel of this particular criteria vs. regular gasoline. This number is our Diesel Deflator.
Then, we simply take whatever mpg claims our diesel friends are tossing around, and we divide by the DD. That will give us an apples-to-apples comparison to a Prius, which as we all know uses good 'ol regular.

Example:
------------------------------------
Diesel costs (at least) 10% more than regular gasoline. DD = 1.1. So, 65mpg suddenly becomes....59 mpg

Diesel has at least 30% more Carbon, per gallon compared to regular gasoline. DD = 1.3, so 65mpg = 50mpg

Diesel yield is only half gasoline at most U.S. refineries.
In other words, "foreign-oil footprint" is at least 30% (or more) greater. DD= 1.3, so 65mpg = 50mpg

Clearly, the current Prius already beats this future Golf on the last two (combined; tie highway). The Gen IV will certainly be competitive in the 1st.........and the diesels won't even be able to touch the PiP


So, the first metric is DD.
The second metric you need to know w./ respect to the Prius is this:

Passenger Volume Golf: 94 ft3 (Hatchback) Jetta: 94 ft3 (4 door) Prius: 94 ft3 (Hatchback)
Luggage Volume Golf: 15 ft3 (Hatchback) Jetta: 16 ft3 (4 door) Prius: 22 ft3 (Hatchback)

 

Yes, those pleasant little quirks like freezing intercoolers, sticking exhaust flaps, banging DSGs, etc.. Oh, joy!

 

VW group makes a great Diesel motor, and has for many years, now if they could make everything else work!

 

That's mostly do to market demands and economics. US refineries make more gasoline because the 90+% of US personal car fleet burns gasoline. The higher gasoline output is at the expense of the diesel and heavier fractions. There is no petroleum in the world that has a gasoline fraction that would meet US demands. Even the fraction there is is too low in octane.

So US refineries are cracking the diesel and heavier stuff into smaller carbon chains. Which then have to be reformed into slightly longer chains to get gasoline of the proper octane to burn in modern cars. The short of it is that gasoline takes more energy to make than diesel. Mainly do to the fact that we are making gasoline from diesel.

Another hitch in the 'foreign-oil footprint' DD is that the US is shipping diesel to Europe. Whose refineries are shipping gasoline to the US.