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Audi e-tron
Concept has four electric motors and a single battery pack

The world of electric and hybrid vehicles is progressing and growing at a rapid pace. While most people still think of hybrids and electric vehicles as low performance machines, there are an increasing number of high-performance electric vehicles being unveiled.

The first high performance EV was the Tesla Roadster with good performance thanks to the impressive torque of the electric motor. Audio has unveiled its latest concept car at the International Motor Show in Frankfurt called the Audi e-tron which just so happens to look like an electrified Audi R8.

The most impressive feature of the concept isn’t just its all-electric power train, but its tremendous amount of torque. Audi claims that the e-tron has a torque rating of  3,319.03 lb-ft. All that torque is generated by four individual electric motors situated at each wheel allowing the vehicle to be all-wheel drive.

The car has a total of 313 HP and promises to hit 60 mph in about 4.8 seconds. A more impressive number is that the car can go from about 37 mph to 74 mph in only 4.1 seconds. The all-electric range for the lithium-ion battery pack is 154 miles.

The EV is a large beast at 3,527 pounds and it measures in at 74.5-inches wide x 167.72-inches long and 48.43-inches tall with a wheelbase of 102.36-inches. The massive single battery pack alone weighs 1,036 pounds.

"We are trying to find a concept that requires no compromises," says Michael Dick, Member of the Board of Management of AUDI AG, Technical Development. "Electromobility means more to us than just electrifying conventional cars. Instead, we are dedicated to a holistic approach to all aspects of the topic."

Audi's American President called potential Volt buyers idiots not long ago and then quickly claimed he forgot what he said. There was only speculation surrounding the Audio EV concept at the time the comments were made.



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RE: <Drool>
By Spuke on 9/17/2009 1:31:20 PM , Rating: 2
quote:
Have you ever run a Dynojet?
I have not but that's why I'm asking. When you get a graph from a dyno, the torque rating isn't 4500 lb-ft (or whatever ridiculously high number). Maybe this discussion of torque multiplication is confusing me but I always thought that the actual torque number when a car is dyno'd was the result of the gearbox multiplication. My car would make say 220 lb-ft at the wheels on a Dynojet not 3000 lb-ft.


RE: <Drool>
By theapparition on 9/17/2009 3:58:35 PM , Rating: 2
No. It measures that high number and then back-calculates through input parameters to determine theoretical engine torque.

That's why I stated before the the concept of rwtq is flawed, yet often quoted (hell, even by myself). Yet what is being delivered to the tires is quite different.

In fact, dynojets don't even measure the engine RPM on older cars, rather use the tire diameter and tire RPM to generate those graphs.

For a simple ballpark figure, take the engine power and divide it by tire RPM. Power = Torque * RPM/5252.

So if an engine is developing 300hp at 6000RPM, and there is a 10x reduction through gearing, than the torque being delivered is 300hp*5252*(6000RPM/10) = 2626ft-lbs.

Pretty simple, and also requires that a dynojet knows what size rear differential and what gear the car is being operated in. Otherwise the results are junk......and also how some unscrupulous tuners like to improve thier results.


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