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N.Y. Auto Show: Jaguar unleashes pair of quick cats!

Jaguar got an early start on the 2013 New York Auto Show by announcing Tuesday that two extra-quick cats will be joining its growing stable.

The first is the track-oriented XKR-S GT. Only 25 of these two-door coupes will be coming to the U.S., and though they're designed for track use, all will be street-legal.

The GT's powertrain is largely unchanged from the XKR-S that debuted at the 2011 New York show: a supercharged 5.0-liter V-8 makes 550 horsepower and 502 pound-feet of torque. This power is pushed to the rear wheels via a six-speed automatic transmission and an active rear differential.

Where the GT differs from its more demure -- relatively speaking -- brother is in the suspension, steering and aerodynamic changes. The tweaks help the GT hit zero-60 mph in 3.9 seconds, which is .3 seconds faster than the non-GT model.

"[The GT] has been developed in the wind tunnel and on the racetrack with the sole aim of creating as much high-speed stability and downforce as possible," said Ian Callum, director of design for Jaguar. "Nothing has been styled for the sake of it."

In order to increase downforce -- which is everyone's friend on the track -- the GT adds items such as a large carbon fiber rear wing, front splitter, rear diffuser, and an aluminum undertray.

Suspension changes include a wider front track and height-adjustable adaptive dampers with stiffer spring rates. The steering system is revised, giving drivers a quicker steering ratio.

Weight is kept to a minimum through the use of aluminum for the entire body structure. The GT also gets the first application of carbon-ceramic brakes on a production Jaguar.

The XKR-S GT and the non-GT version -- and is scheduled to arrive in dealerships in August.

The GT's New York debut was complemented by the more subdued, yet equally powerful, XJR sedan. The full-size XKR draws 550 horsepower and 502 pound-feet of torque from a familiar source: a supercharged 5.0-liter V-8.

This power is pushed to the rear wheels via an eight-speed automatic transmission and an active differential. The XJR gets minor body tweaks to set it apart from lesser XJs, as well as an updated suspension. The car will come in regular or extra-long versions, respectively.

Courtesy of Los Angeles Times

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Tuesday Tip: When temperatures affect tire inflation!

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When outside temperatures drop or soar, tires tend to lose pressure. A drop of 10 degrees, in fact, will decrease a tire’s air pressure by one or two pounds. Tires can lose even more air in hot weather. Under-inflated tires can result in accelerated wear and poor driving performance. If you live in a place where temperatures vary a lot, check your tire pressure often and add air as needed.

Courtesy of ReadersDigest.com

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Audi unveils A3 Sportback G-Tron with bi-fuel power, 808-mile range!

Audi is taking a large step towards sustainable mobility with the A3 Sportback g-tron. The compact five-door car, due to make its debut at the end of the year, is powered by the CO2-neutral fuel Audi e-gas. The fuel will be produced in the power-to-gas plant in Werlte, Germany. This new car innovatively combines ecological balance, economy and high-tech solutions.

The Audi A3 Sportback g-tron comes with the full gamut of Audi's technology expertise – from ultra-lightweight technology, and infotainment, to driver assistance systems. But first and foremost it showcases state-of-the-art CNG drive technology, starting with the fuel storage. Its two tanks under the luggage compartment floor can each hold seven kilograms (15.43 lb) of CNG at a maximum 200 bar pressure. In tune with the ultra-lightweight construction concept, each tank weighs 27 kilograms (59.52 lb) less than its conventional counterpart.

The tanks consist of a new type of matrix. The inner layer consists of gas-impermeable polyamide polymer, while a second layer of carbon fiber-reinforced polymer (CFRP) gives the tank its extremely high strength; a third layer of glass fiber reinforced polymer (GFRP) provides rugged protection against damage from the outside. High-strength epoxy resin is used to bind the fiber reinforced materials.

A second highlight of the Audi A3 Sportback g-tron is its electronic gas pressure regulator. This compact and lightweight component reduces the high pressure of the gas flowing from the cylinders down to around five to nine bar in two stages.

It ensures that the right pressure is always present in the gas rail and at the injector valves – low pressure for efficient driving in the lower speed range, and higher when the driver calls for more power and torque.

If the pressure in the tank drops below ten bar, the engine management system automatically switches over to gasoline operation. The Audi A3 Sportback g-tron is fully bivalent, i.e. its performance figures are identical in CNG and gasoline modes.

CNG provides a range – based on standard fuel consumption – of around 400 km (248.55 miles), with gasoline providing another 900 km (559.23 miles) if necessary; the total range is approximately on a par with an Audi TDI. Two displays in the instrument cluster provide the driver with up-to-date information on the fuel level in each of the tanks. The driver information system also displays the current fuel consumption based on the particular operating mode.

The two filler necks are placed under a common fuel flap. After refueling, and whenever it is very cold, the engine is started with gasoline initially, then it is switched over to natural gas as quickly as possible.

The engine is based on the new 1.4 TFSI. Key modifications relate to the cylinder head, turbocharging, injection system, and the catalytic converter. Developing 81 kW (110 hp) and 200 Nm of torque, the Audi A3 Sportback g-tron has a top speed of 190 km/h (118.06 mph), with 0 to 100 km/h (0 - 62.14 mph) taking eleven seconds. The five-door car consumes on average less than 3.5 kilograms per 100 km of CNG or Audi e-gas – the fuel that is generated from eco-electricity in the Audi e-gas project. CO2 tailpipe emissions are less than 95 grams per km (152.89 g/mile) in gas mode.

The greenhouse gas balance is even more attractive in a well-to-wheel analysis that accounts for all factors from the fuel source to the car's wheels. When the A3 Sportback g-tron is powered by Audi e-gas, no more CO2 is released than was chemically input in its production beforehand – creating a closed loop. When the energy required to build the e-gas facility and wind power generators is included in a comprehensive analysis, CO2 emissions are still less than 30 grams per km (48.28 g/mile).

Buyers of the Audi A3 Sportback g-tron will presumably obtain the e-gas at the public CNG refueling stations via an ecological accounting­ method, similar to the method currently in existence for obtaining eco-electricity.

With the e-gas project, Audi is the first automobile manufacturer to develop an entire chain of sustainable energy carriers. The start of the chain has electricity produced from renewable energy sources; the end products are hydrogen and the synthetic Audi e-gas. Construction of the world's first industrial plant to produce synthetic methane (e-gas) from CO2 and renewable electricity is almost complete in Werlte (Emsland district of Lower Saxony), Germany.

The Audi e-gas plant uses the renewable electricity in the first stage for electrolysis – splitting water into oxygen and hydrogen (Audi e-hydrogen), which could one day power fuel-cell vehicles. Because there is not yet a widespread hydrogen infrastructure, however, the hydrogen is then reacted with CO2 in a methanation plant to produce renewable synthetic methane, or Audi e-gas. Chemically speaking, this e-gas is identical to fossil-based natural gas. As such, it can be distributed to CNG stations via the natural-gas network.

Thanks to the power-to-gas process, the electricity grid and gas network are being linked bidirectionally for the first time. Until now while you could generate electricity from gas, the reverse was not possible. The Audi e-gas plant therefore paves the way for tapping into the natural-gas network with its huge capacity as a storage and transport system for hitherto excess electricity capacity.

The CO2 used in Audi's e-gas plant is a waste ­product from a nearby biogas plant, operated by power utility EWE. The CO2, which would otherwise pollute the atmosphere, is chemically bonded into the fuel at the Audi e-gas plant. The e-gas plant will annually produce about 1,000 metric tons of e-gas and will chemically bind some 2,800 metric tons of CO2. This corresponds roughly to the amount of CO2 that 224,000 beech trees absorb in a year.

The CO2-neutral e-gas from Werlte will power 1,500 new Audi A3 Sportback g-tron vehicles 15,000 kilometers (9,320.57 miles) every year. The power industry can also benefit from Audi's e-gas project, as it addresses the nagging challenge of how to store large quantities of renewable electricity produced from wind turbines and photovoltaic systems efficiently and irrespective of location. The electricity-gas cogeneration technology could significantly foster the expansion of renewable energies.

Courtesy of Autoblog.com