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Porsche 918 Spyder Concept
Porsche is bringing sexy back with the 918 Spyder Concept

Porsche is not a company that produces concept cars very often. Come to think of it, only the Porsche Boxster and Carrera GT spring to mind as concept cars that the German sports car manufacturers has displayed within the past twenty years. That's not to say that Porsche can't pull out a nice concept whenever it wants to -- and today, the company has done just that.

Porsche unveiled its new 918 Spyder concept that not only brings sleek styling to the table, but also a wealth of high-tech powertrain goodness. Looking somewhat like a gorgeous mashup up of a Ferrari F430, Porsche Carrera GT, Porsche Boxster, and Porsche 911 GT1, the 918 Spyder concept features a mid-engine layout, seating for two people, and all-wheel drive.

The roadster also features dual side-exiting exhaust pipes on either side of the vehicle along with a nod to the past with an intriguing "disk" wheel design.

Being that this is a Porsche first and foremost, this vehicle is all about performance. Gone is the flat-6 that powers the mid-engined Boxster and Cayman (along with the rear-engined 911) and in its place is a high-revving (9,200 rpm) V8 engine producing 500 hp. As if that wasn't enough, there are also two electric motors installed in the vehicle (one for the front axle, one for the rear axle). The electric motors add another 218 hp to the mix.

Porsche isn't spoiling the fun by using a continuously variable transmission (CVT) in the 918 Spyder -- instead, the company is using a version of its seven-speed Porsche-Doppelkupplungsgetriebe (PDK) dual-clutch transmission which transmits power to the rear wheels. The front wheels are driven by a fixated ratio transmission.

Porsche says that the plug-in hybrid 918 Spyder can bolt to 60 mph in just 3.2 seconds and can travel 16 miles on battery power alone. The 3,285-pound vehicle is said to deliver an estimated 78 mpg (U.S.) according to Porsche.

No one knows if all of this performance goodness will ever make its way into a production vehicle, but one can hope that at least the styling cues and maybe a toned down version of the hybrid system could make it into a production vehicle.

Porsche is also readying a hybrid version of its second generation Cayenne SUV. The hybrid powertrain is said to achieve 34.5 mpg on the European cycle.



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Sick
By amanojaku on 3/1/2010 4:25:49 PM , Rating: 2
High ICE revs means low torque (should be about 285ft-lb for 500HP @ 9200RPM), so the ICE is best when this thing is already moving. Electric motors have low HP, but generally have crap loads of torque at all revs, so the electric motors are best to get this thing moving from a standstill. This may never be practical for normal cars but it's one hell of a design for a sports car!




RE: Sick
By Camikazi on 3/1/2010 6:13:30 PM , Rating: 2
I so need to become rich fast, I want this, I want it now.


RE: Sick
By fic2 on 3/1/2010 7:28:30 PM , Rating: 4
4 8 15 16 23 42


RE: Sick
By Noya on 3/1/2010 9:39:07 PM , Rating: 2
quote:
High ICE revs means low torque (should be about 285ft-lb for 500HP @ 9200RPM)


I don't think so.

A Ferrari F430's V8 spins to 8,500rpm and has 483hp/343tq.

The Ferrari 458 4.5L spins to 9,000rpm and has 560hp/400tq.

The high rev engine with your rating doesn't exist. The E46 BMW M3's S54 engine reds at 8,000rpm and has 343hp/269tq.


RE: Sick
By amanojaku on 3/1/2010 11:44:25 PM , Rating: 5
First, you need to understand car specs. By definition, torque peak occurs at a lower RPM than power peak. Therefore, the torque at power peak is lower than the torque at torque peak. Obviously, since peak means top, and an ICE does not have flat torque through all RPMs.

The F430 has its peak torque of 343 ft-lb at 5250 RPM, while the engine achieves peak power of 483HP at 8500 RPM. The torque at 8500 RPM is around 298 ft-lb, not 343.

The 458 Italia has its peak torque of 400 ft-lb at 6000 RPM, while the engine achieves peak power of 560HP at 9000 RPM. The torque at 9000 RPM is around 326 ft-lb, not 400.

The M3 has its peak torque of 269 ft-lb at 4900 RPM, while the engine achieves peak power of 343HP at 7900 RPM. The torque at 7900 RPM is around 228 ft-lb, not 269.

Second, you need to understand the relationship between HP and torque. If two engines have the same HP but different RPMs the lowest RPM has higher torque. If the M3 had a power peak of 483HP at 7900RPM it would have 321 ft-lb of torque; that's 23 ft-lb more than the F430. If the M3 had a power peak of 560HP at 7900 RPM it would have 372 ft-lb of torque. That's 46 ft-lb more than the 458 Italia.

You should look at a power curve as it makes more sense when you see the picture.

http://en.wikipedia.org/wiki/Power_band
http://en.wikipedia.org/wiki/Horsepower#Relationsh...
http://craig.backfire.ca/pages/autos/horsepower


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