2013 Audi Q5 Quattro S-line Nav & Sport Int Pkg Bang & Olufsen Sound System on 2040-cars

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Electric turbos promise big performance and efficiency gains in the near future

An electric turbo system boosts efficiency between 15 and 20 percent, according to Audi.
Turbochargers, like acoustic guitars, use moving air to create magic. And electric turbochargers, like electric guitars, provide the ability to amp up that magic to amazing new levels.

2015 Audi A3 Cabriolet

When my 758-mile journey on the A3 TDI Challenge came to an end in Boulevard, CA, Audi had a very nice consolation prize waiting for me: the 2015 A3 Cabriolet you see here. And with miles left to drive before reaching my hotel in Coronado (just outside of San Diego), what better way to celebrate my personal victory of achieving nearly 60 miles per gallon in the TDI than to run the rest of the route in couple of turbocharged A3 droptops? After all, the efficiency part of my drive was done, so it was time to have some fun. The A3 Cabriolet comes to market just as the sun sets on another four-seat convertible from the Volkswagen Group stable: the Eos. That car, often criticized as being too expensive, is technically replaced by the Beetle Convertible as far as VW-badged products go. But for those who still prefer something a bit more upmarket, the A3 Cabriolet will fill the void nicely, and with more style and grace than the Eos ever had. Driving Notes The A3 Cabriolet arrives with a choice of engines. On the base end lives a 1.8-liter turbo-four with 170 horsepower, 200 pound-feet of torque and front-wheel drive, or you can pony up for the 2.0T with 220 hp, 258 lb-ft and standard Quattro all-wheel drive. Regardless of engine, the only transmission available in the A3 Cab is Audi's six-speed S-tronic dual-clutch unit. This is a fine cog-swapper, with quick shifts regardless of chosen powertrain, and steering wheel-mounted paddles that offer plenty of fun from behind the wheel. That said, I found it best to just leave the transmission alone, no matter the engine. The paddles are entertaining, sure, but slick the gear selector into Sport and the A3 will instinctively hold gears through turns and always have you right in the heart of the powerband. The 1.8T's 170 hp and 200 lb-ft are more than adequate for duty in the 3,373-pound A3 Cabriolet. I was never bothered by a lack of power, especially with the engine on boil with the transmission in its sport setting. Hitting 60 miles per hour takes 7.4 seconds, en route to an electronically limited top end of 130 miles per hour. If speed is your thing, though, the 2.0T certainly delivers quite a punch. That same 0-60 sprint takes just 5.9 seconds with the more potent powerplant, and you can really feel the stronger rush of power right off the line, even with the quicker A3's 210-pound weight penalty.

Stanford goes from Pikes Peak to Thunderhill with autonomous Audi TTS

In the years since Stanford University engineers successfully programmed an Audi TTS to autonomously ascend Pikes Peak, the technology behind driverless cars has progressed leaps and bounds. Back then the Audi needed 27 minutes to make it up the 12.42-mile course – about 10 minutes slower than a human driver. These days, further improvements allow the vehicle to lap a track faster than a human. The researchers recently took their autonomous TTS named Shelley to the undulating Thunderhill Raceway Park, and let it go on track without anyone inside. The Audi reportedly hit over 120 miles per hour, and according to The Telegraph, the circuit's CEO, who's also an amateur racing driver, took some laps as well and was 0.4 seconds slower than the computer. To make these massive technological advancements, the Stanford engineers have been studying how racers handle a car. They also hooked up drivers' brains to electrodes and found the mind wasn't doing as much cognitively as expected. It instead operated largely on muscle memory. "So by looking at race car drivers we are actually looking at the same mathematical problem that we use for safety on the highways. We've got the point of being fairly comparable to an expert driver in terms of our ability to drive around the track," Professor Chris Gerdes, director of Stanford's Revs Program, said to The Telegraph. With progress coming so rapidly, it seems possible for autonomous racecars to best even elite drivers at some point in the near future. Related Video: