17 September 2013

Having already declared the Tesla Model S as a landmark car, the time comes to see just how much power those motors and batteries produce. Will it be enough to shame some of the world's most exotic sports cars and supersaloons? Steve Sutcliffe takes a Model S to a rolling road to see how much bhp is generated on the dyno.

Video: Tesla Model S vs Aston Martin Rapide S

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17 September 2013

Parkers guide quotes it as 469BHP. Tesla website says its 410BHP.

17 September 2013

Thanks again. That power graph to me looks rather steep.
An absolute gem of a car, gorgeous as well as stimulating.


17 September 2013

... the Tesla's ~430 probably equates to an equivalent of ~470 in a conventional IC powered car, due to the transmission losses in the latter - often in the region of 10% between motor and wheels.

17 September 2013

It says on your Autocar video the power and torque data.
410hp peak reached from 5000rpm to 6700rpm and 443lbft from 0 to 5100rpm.
Using this information.
Torque = HPx5510 (constant based on above figure)/rpm

428.2bhp is 434.1metric HP.

So I make the tested car to have 469lbft. But that maybe completely wrong.


17 September 2013

I couldn't see the rpm readout, power is on the Y-axis, mph on the X-axis.

Anyhoo, I calculate an *average* torque over the 0-60 dash of 392 ft lb. I think.

Which means your peak torque figure could well be correct. Certainly seems about right for a 2100kg car achieving a 0-60 time of 4.2 seconds - with no gear changes to worry about.

EDIT: 'font-of-all-knowledge' wikipedia gives a figure of 443 ft lb.

17 September 2013

Another great vid, had some corkers recently.

I also can't help feeling that the penny's finally dropped, and Steve & Co. have finally realised that EVs are really not Autocar's nemesis. The opposite is actually true.

18 September 2013

Those who trusted and placed their brass where their arses were are today waddling with fat pockets. Great car - took a while and trust and patience but the result of the money and the wheels is simply amazing. Pity we had to let the Yanks do it - but there again they did give us the Model T

18 September 2013

...at the onset of this piece, but surely it is the battery (of 85kWh) that is powering the 3-phase motor of 300-odd kW, rather than the motor powering the battery as he stated. In ICE terms it is like saying that it is a 65 liter petrol tank powering a 400bhp engine.

Viewing it this way, one can see that if you were to run the car at full tilt for just less than 20 minutes (40 miles @ 130mph) you would deplete the battery. Given that the car has a range of roughly 300 miles at 50mph (6 hours driving), effectively the car only needs roughly 14kW to propel it.

18 September 2013

This car has a minimum of 60,000 dollars of batteries in it (considering the price difference between Tesla models). With a price of over 100,000 dollars, is it that amazing that it has some juice in it and can manage 3 hours of highway driving in 22 degree Celsius?

18 September 2013
bezor Ta wrote:

This car has a minimum of 60,000 dollars of batteries in it (considering the price difference between Tesla models).

that is patently not the case.

How 'bout you provide the cost for replacing a complete engine in, say, a BMW M5. Or indeed any one of the several hundred moving parts it contains, each of which is a likely point of failure; each of which requires many man hours to locate, remove and swap out in the event they break.

The Tesla has a tiny fraction of that ancient, oily, labyrinthine complexity.

bezor Ta wrote:

It should not be marketed as a climate savior or the ultimate solution to EV cars.

it isn't. That kind of stuff is all in your head.


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