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Watch 14 hot rides take over concept car lawn at Pebble Beach

The Pebble Beach Concours d'Elegance is an annual celebration of the beautiful, old cars that grace Monterey Car Week. But Monterey – and Pebble – features lots of newer metal, too, and that includes the concept lawn at Pebble Beach. Now, "concept lawn" isn't a totally accurate name anymore, and you'll see why in the list below. This year especially, plenty of production cars can be found in the area once reserved for the conceptual. Still, we're happy to see them. Here's what's featured this year: Alfa Romeo 4C Spider Audi R8 BAC Mono Bentley EXP 10 Speed 6 BMW 3.0 CSL Hommage R Buick Avenir Galpin-Fisker Rocket Speedster Hyundai HCD-16 Vision G Coupe Icona Volcano Infiniti Q60 Lamborghini Asterion LPI 910-4 Maserati Ghibli McLaren 570S Rolls-Royce Wraith By our count, that's seven concepts out of fourteen cars. But it still makes for one hot group of metal. Check 'em out in the gallery above. Related Video: Related Gallery 2015 Pebble Beach Concept Car Lawn View 38 Photos Image Credit: Copyright 2015 Drew Phillips / AOL Design/Style Alfa Romeo Audi Bentley Buick Infiniti Lamborghini Lincoln McLaren Porsche Concept Cars Videos Original Video Pebble Beach

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

By this time next year, the Audi A3 Sportback will be offered with a variety fuel-efficient powertrains ranging from diesel to the all-electric E-Tron, but perhaps the most interesting is the all-new G-Tron model, which uses Audi's innovative carbon-natural compressed natural gas called e-gas. Previously called A3 TCNG, we first heard about this technology last year, but now Audi has confirmed that this low-emission, sustainable-fuel will debut by the end of this year on the A3 Sportback G-Tron.
To create this e-gas, a plant in Werlte, Germany uses electricity to split water into hydrogen and oxygen. As hydrogen fuel cell vehicles become more popular, Audi says that this process could also be used to produce hydrogen fuel, but to create CNG, it mixes the hydrogen with carbon dioxide to create "synthetic methane." Since it is identical to the CNG available today, Audi's e-gas can be shipped and stored using the existing CNG infrastructure. Making the whole process even greener, Audi obtains the CO2 for this process from a nearby biogas plant, which would otherwise be released into the atmosphere.
Differentiated from the regular versions of the A3, the G-Tron features a pair of tanks under the rear cargo floor holding 15.43 pounds of CNG, which can power the car for almost 250 miles. What's more, the A3's conventional gasoline tank is still in place, giving the car an addition 560 miles of range. In total, that means the A3 G-Tron has a driving range of more than 800 miles. To run on both CNG and gas, Audi made changes to the car's 1.4-liter four-cylinder engine (including the turbo, cylinder head and fuel injection system) and catalytic converter.

Audi A3 E-Tron could launch in October in US

When we test drove the Audi A3 E-Tron plug-in hybrid in Europe last summer, Audi was talking about the vehicle's introduction in the US, but left the exact date up in the air. Summer or Fall 2015 was as specific as anyone was willing to get. Now it looks like the plug-in will arrive in October. One of the rumors we heard over the last few months was that the A3 E-Tron was not ready for the US because of poor cold-weather performance. From what we've heard, under a certain temperature limit, the engine needs to kick in at all times, no matter what the battery state of charge is, and some European A3 E-Tron owners are disappointed that their EV sometimes isn't all that electric. Audi's solution needs to take into consideration how to balance utilization of battery power in less-than-optimal temperature ranges with passenger comfort and how any excess battery use impacts longevity. Audi's "fairly conservative" position will "ensure the long-term credibility of the E-Tron platform and plug-in technology." - Brad Stertz Brad Stertz, the corporate communications manager for Audi of America, told AutoblogGreen that, "Audi is taking a fairly conservative position to ensure the long-term credibility of the E-Tron platform and plug-in technology, while still creating the best experience for our drivers in each region. Overall, I think it is safe to say low temps affect performance in all vehicles to some degree, but that plug-ins face unique challenges that we will continue to work through with the A3 e-tron and other plug-in models to follow." Stertz also said in April that the US configuration for the A3 E-Tron was still being fine-tuned. For example, there were some software differences under consideration to meet US driving preferences. Looks like we only have four more months to wait and see. Related Video: