Discussion on:

Believe it! New sports car goes 200 mph, gets 70 mpg

I don't believe it. They're being coy being their unverified claims are false.

Just like there's an entire underground of people doing hybrid and electric car stuff, there are groups concentrating on Diesel mileage (on their Jetta TDIs for example) and getting some pretty impressive numbers.
See this article - http://www.smartplanet.com/blog/thinking-tech/volkswagen-car-goes-1626-miles-on-a-tank-of-gas/11581

I call shenanigans.

Clatter, clatter, clatter, clatter. You want fries with your clatter, run on it on fry oil.

Using modern, high-end lubricants, better ignition parts (spark plugs, etc), better air intake, better exhaust, and decent tires my old 1990 Geo Storm got upwards of 50 MPG highway. My 1995 (admittedly terrible) Mitsubishi Mirage S (basic coupe) gets upwards of 43!! SOHC Saturn SC models got something like 45+.

There's a sports car called the Avion that gets upwards of 100MPG. Look it up.

The problem is that somewhere along the line past the mid-nineties we just plain forgot how to build engines. America suffers from not only collective amnesia but an incredible brain drain as we have incredibly lousy engineers at the corporate helm. We focused on bigger, louder engines with no real increases in any kind of efficiency, getting to the point where my parents think that an absolutely pathetic 20+ MPG highway is "really good".

Of course the car in this article can get 70+ MPG with these kinds of specs. It's just plain good engineering. Also, look at the smooth lines and curves - less drag means more efficiency. I'll also bet you the vehicle doesn't actually weigh all that much.

Good to see your articles young man, I like your subject matter and reporting.

Secrecy doesn't mean they don't have anything. Breakthroughs in fuel/engine technology - any technology for that matter - must be closely guarded. If they do not yet have safeguards in place (patents, etc.) to protect their innovation from thieves - and there are plenty of them - they would naturally not want to be specific about it. Has no one making these accusations ever heard of Apple? Or Microsoft? Just to name a few.

Wouldnt a 2000 mile range and 70 mpg equal about a 30 gallon fuel tank? That seems exceptionally large. Again, Smart Planet needs to do some editing.

PS There are several reasons for relatively poor gas mileage (I had a 80 VW diesel that consistently got 50 mpg) Some of those reasons for poor gas mileage are government mandated, including emission mandates, fuel mandates (ethanol) and safety mandates (impact protection, 5 mph bumpers), some are customer comfort mandates, (AC, power windows, etc)

Back in the mid to lat 1960`s there was a car a called a Morris 1000. It was a zippy little box on wheels that was fun to drive. We got 57 miles per gallon on Imperial gallons. A little later a friend bought a diesel VW Rabbit and got around 50 MPG Imperial gallons. If he had coughed up some more cash he could have got a model with a higher gear or overdrive and that would have given him very close to 70 mpg imperial. There seems to be some mystique about getting better gas mileage, not sure why. I`m also wondering about the makeup of the car described in the article. How much does it weigh? That would have quite an influence on fuel consumption. One of the cheats on carbon emissions in automobiles seems to me to be air injection into the exhaust manifold. Yes it would help burn up fuel that escaped being consumed in the cylinders. It also dilutes the carbon emissions in parts per million going out the tail pipe where the government vehicle emission checkers hook their machines to. Something really fishy there. You can have a horribly inefficient engine look terrific under those circumstances. I'm hoping this new car contains some real improvements in engine design. Too many lazy automakers just trying to get product out without thought.

You guys don't get it. Who cares if some little yuppie race-car can go really fast and use less fuel. How about a 1 ton, diesel powered pick-up truck that has the horse power and torque needed to tow equipment to a job site. This has value and results in savings to businesses that create jobs and make things work for those of you who are concerned about and can afford a "useless" sports car that can do nothing more than haul you ass around.

You can bet it doesn't get that kind of mileage when it's going 200 mph.

Not that remarkable, really. Light weight, low drag... probably shuts down most of the cylinders when it doesn't need the power.

My comment is related to the drive line of the automobile. The transmission in the vehicle could be an infinately variable a hydrostatic drive that provides an infinately variable ration transmission that can be adjusted at random to any input rpm to output rpm within the capability of the unit that was selected for this vehicle. Overall efficiency of these units is approximately in the low to mid 90% when new. Other possible options for infinate variation is electric servo motors, or variable belt drive units.

As a physicist and energy management consultant, I always start with energy considerations. Is there enough energy in a gallon of fuel to run the car 70 miles? With careful driving and a well-designed, lightweight vehicle, the answer is yes. Can it be done with normal driving in a combined city/highway cycle? Doubtful. Can it be done while having fun with all that acceleration or driving at speeds over 100 mph? No! I want to see some actual performance numbers accompanied by a description of the driving conditions and verified by a competent, reputable organization other than the manufacturer.

Great. We have an efficient car that may sell 100,000 units due to price. Big green savings! We need these cars to be sold in the millions to make a green difference. The price has to be under $30,000 to sell big numbers.

"IF" these do go into mass production, where will you take it for service ? I'd be leery of having one, and find out I have nowhere to take it for service/repair.

Also, as one poster mentioned, are these MPG claims in US or Imperial gallons ?
One imperial gallon is approximately equal to 1.201 U.S. gallons.

Personally, I'm with another posters thoughts. Build me a full size pick-up that has the torque and power to PULL something. I'd even settle for "JUST" 50 MPG and say 100MPH top end.

A little bit pricey !

Seems to be the combination of a huge engine, with a very high-tech transmission that lets the diesel run as a diesel should; at a very low range of low rpms. The low-speed torque is because the engine itself is huge, and the tranny lets it step down suddenly when more torque is required. Done seamlessly, this ought to do it.

Wouldn't be surprised, however, to see a smart torque-return system incorporated into the tranny.

Pretty looking car. Unfortunately, probably sucks to drive in any inclement weather. I don't see any roof, or any setup for installing a roof.

Why can they not make a car that gets 50-100mpg and tops out only at 100mph. That is the most ANY family would need n a daily basis.

RE: Pickup trucks - yes there is a place for them, but for "mom" to be driving a HEMI "dualie" to the corner market to pick up some milk is supremely ridiculous. I live in town and my neighbours have 2 (TWO) huge pickup trucks for daily commutes, etc. Why? Because that is what everyone else is driving these days, and bigger means better, right? $200 for each fuel fill-up is insane! It only costs me $45 to fill my 2000 Olds Intrigue, and I still get around 36mpg. If I could, I would drop a diesel and advanced tranny in it in a second.

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