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2015 Audi A8 rises to meet the challenge [w/video]

It's turnover time in the extra large premium sedan segment. With Mercedes having stuffed HAL 9000 in its new S-Class, other luxury marques are quickly updating their own super sleds to keep up with this persistent march of technology. While far from a full redesign, the Audi A8 has changed enough for 2015 in terms of styling, powertrains and new technology to keep it in the conversation.
For starters, the A8's exterior design has been redone, with the most noticeable changes happening up front. The trademark 'gaping maw' grille is a little less gaping, while the headlights now feature a straight lower edge of LEDs, excising the old model's droopy-eyed look. Speaking of headlights, Audi now offers optional Matrix LEDs, the latest in headlight tech, with 25 individual elements per side that can be turned on or off and dimmed as the situation demands. The rear of the A8 has also been resculpted and looks very much inspired by the derrière of the A7, with a single chrome strip connecting the new LED taillights.
The A8's full suite of powertrains has also been upgraded, with the supercharged 3.0-liter V6 now producing 310 horsepower (up 20 according to Audi, though down 23 compared to the US-spec 2013 model). The twin-turbo 4.0-liter V8 is now rated at 435 hp, a solid 20-horse increase that lowers the car's 0-62 time to just 4.5 seconds. That's within spitting distance of the 520-hp S8's time of 4.1 seconds. That aforementioned super sport sedan's engine remains unchanged, as does the 6.3-liter 12-cylinder powerplant in the A8 L W12, but Audi's two diesel engines have both improved, with the 3.0-liter V6 producing an extra eight horsepower (256 total) and the 4.2-liter V8 gaining an extra 34 hp (385 hp) to go along with its more-than-adequate, though unchanged, 626.93 foot-pounds of torque.

Audi 4.2-liter V8 to live again in next-gen R8

Fellow auto enthusiasts, it looks like the car gods have smiled upon us. Word is that Audi's stupendous 4.2-liter V8 will once again be available in the next-generation R8. Rumors pegged the trusty 4.2 as a dead engine revving, thanks to Audi's newer 4.0-liter twin-turbocharged V8 found in models like the S6 and S7.
We expected the 4.0-liter to be the go-to engine in the next R8, but according to Car and Driver, there have been some issues cooling the force-induced mill in the mid-engine R8. The issues are so severe, in fact, that the 4.2 is going to be retained in the car's second generation.
It's more than just practical matters like cooling that are keeping the R8 from going turbocharged. C/D reports that even with the current state of forced induction, a turbocharged R8's throttle response and its resultant exhaust note would suffer too much to be feasible.

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.