The truth about Audi e-Tron’s 3319 lb-ft of torque

There was a time when people can’t seem to contain themselves when talking about Audi’s e-Tron Concept. But now that its claim to have 3319 lb-ft of torque has been explored, the enthusiasm for the concept, which is currently on display at the 2009 L.A. Motor Show, has waned quite a bit.

At the recently held Frankfurt Auto Show, the electric sports car was applauded for its 3319 lb-ft of torque, which is roughly ten times what most other cars have. Now that the e-Tron makes its North American debut in L.A., the excitement has been lessened somewhat due to the discovery that the E-tron’s real torque output is much closer to 300 lb-ft than 3000 lb-ft.

Audi wasn’t exactly lying; it was that it had used a different way of measuring torque. Audi measures the e-Tron’s 3319 lb-ft of torque at the wheels while other firms report peak torque at the output shaft of a motor or engine. The difference between torque at the wheels and at the powerplant is typically about ten-fold due to the torque multiplication effect of transmission and final drive gears. Having said that, Audi hasn’t revealed how much torque the e-Tron actually produces from its four electric motors. The E-tron has 19-inch wheels wrapped in 235/35 rubber.

The car is believed to have a top speed of 125 mph. Assuming that top speed is at the motors’ redline of 14,000 rpm, this would make it similar to the electric motor in the Tesla Roadster. From this, we can compare the rotational speed of the tires to that of the engine and then the gear ratio can be estimated. With a ratio of 13.2:1 for the e-Tron, the result is a total torque output at the motors of 252 lb-ft. This is still very impressive but far from the 3319 lb-ft boasted by the company. If you compare the E-tron to a Tesla Roadster that makes 273 lb-ft of torque with a V-8 R8 that produces 317 lb-ft, it really remains to be an awesome piece of work. An electric sports car that does 0-62 mph in 4.8 seconds is quite an achievement. And it disappoints no one that the e-Tron is headed for production.

Spyker interested in Saab

General Motors Co. set a Dec. 31 deadline for itself to decide whether it will latch on to a bid for Saab or just shut it down. From now until the end of the month, GM will be considering numerous bids for the money-losing Swedish brand.

GM declined to reveal who the bidders were but it is speculated that Dutch super sports carmaker Spyker Cars NV and its Russian owner, Converse Bank, are among those that have submitted a bid to buy Saab. GM said that if it is unable to find a “suitable arrangement” for Saab by then, it “will begin an orderly wind down” of the business.

A source has revealed that Spyker had filed a written bid last Monday to purchase all of Saab from GM. The amount of the bid is undisclosed. Spyker reportedly finds Saab appealing due to its strong image.

The source said that Spyker considers GM’s plans, which include a new 9-4X crossover, to be “extremely viable.” Spyker is believed to be likely to benefit through shared technology and parts. Last Tuesday, the GM board met to discuss the fate of Saab after a deal with the Koenigsegg Group failed to prosper.

According to Bloomberg News, GM is also considering the sale of parts of Saab to Beijing Automotive Industry Holding Co. and closing the brand. A source said that in that scenario, Spyker would likely withdraw its bid since suppliers would leave and the dealerships would fall apart, letting customers lose confidence in the brand.

Nissan GT-R SpecV goes on sale in Europe

Nissan isn’t giving potential buyers a lot of time to decide on whether they’d want to purchase the SpecV model, Nissan’s recently revised 2011 GT-R supercar. Only 40 examples of the car will be made for Europe, reflecting the 40th anniversary of the launch of the first Nissan to wear the GT-R badge.

In the UK, the SpecV has a price tag of £124,900 (based on 17.5% VAT and £405 RFL) which is converted to about €138,000. Nissan will only be accepting orders for the GT-R SpecV at Nissan High Performance Centres (NHPCs) across Europe until January 22, 2010, so there’s really no time to lose.

The SpecV model has a number of features worth mentioning. First, the car has various lightweight carbon-fiber parts, no rear seats, revised springs and fixed-rate dampers, carbon ceramic brake system from Brembo, a titanium exhaust system, bespoke Recaro carbon fiber bucket front seats and 20-inch Ray alloys with extra grippy tires.

The maximum horsepower output is unchanged but the engine’s performance is enhanced with a new high gear boost control device, which briefly increases boost of the twin turbochargers for greater torque in the intermediate-to-high speed ranges. The upgrades to the SpecV resulted to a weight saving of 60kg or 132 lbs over the standard GT-R.