2015 Audi A4 2.0t Quattro Premium Plus 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.

2017 Audi A4 evolves into a larger, lighter luxury sedan [w/video]

Audi took the evolutionary, rather than revolutionary, approach when it came time to redesign the brand's A4. While the latest generation's look might not set hearts racing, a plethora of tiny tweaks by the engineers manage to make the the four-door larger, up to 264 pounds lighter, and slice the drag coefficient down to 0.23. Audi has made its modern reputation on the style and quality of its interiors, and the new A4 seems to make good on that tradition. In-cabin appointments and tech see a serious upgrade, including offering Audi's fully digital, Virtual Cockpit, instrument panel. In the US, the new A4 arrives for the 2017 model year offering power from either diesel or gasoline. The 2.0-liter TDI is essentially a carryover from the Audi lineup, but the 2.0-liter TFSI sees some big upgrades, including a new cylinder head. It's now rated at 252 horsepower and 273 pound-feet of torque. At launch here, all A4s get a seven-speed S-tronic dual-clutch gearbox. Front-wheel drive and Quattro all-wheel drive are available. For an added dose of forbidden fruit, you can check out the crimson A4 Avant in the gallery above the from Frankfurt Motor Show. Take a good look because this long-roof variant isn't coming to the US. Yes, we're listening to sad violin music, too. Although, the next Allroad is coming here eventually after that higher-riding wagon debuts.

2016 Audi S8 Plus burns the 'bahn faster

At no point during my drive of the Audi S8 last year did I think, "You know, this car could really use more power." With 520 horses on tap from a twin-turbo, 4.0-liter V8, the S8 is a damn good luxury/sport sedan. But I'm certainly not going to complain about a big ol' power boost, and that's just what we have here with the new Audi S8 Plus. It's got the same engine underhood, but power is boosted from 520 hp and 481 pound-feet of torque to a healthy 605 hp and 516 lb-ft. There's even an overboost function that increases torque output to 553 lb-ft for short bursts. That means the big S8 will run to 60 miles per hour in just over three and a half seconds. Hot damn. All that thrust doesn't come cheap, though; the S8 Plus costs $115,825. Of course, that's cheaper than the Mercedes-AMG S63 sedan, but the Merc is a decidedly more luxurious car. Still, a 605-hp S8 sounds mighty fine to me. Of course, a 520-hp S8 was already perfectly fine to begin with.