* Audi S5 Coupe V8, Phantom Black/ Red Magma, Awd Quattro, Automatic, Navigation 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.

Which would you rather have, Audi's RS5 or Mercedes' C63 AMG 507?

If you're in the market for a German sports coupe with a naturally aspirated V8, run, don't walk, to your nearest dealer because they are going to be gone very soon. European fuel economy and emissions rules have conspired to force automakers into seeking forced-induction mills. Motor Trend personality Jonny Lieberman is hosting the retirement party in the latest Head 2 Head video, where he takes on the 2014 Audi RS5 and 2014 Mercedes-Benz C63 AMG Edition 507 to decide which is the ultimate Teutonic V8.
To make the decision harder, Lieberman challenges the duo on the first soaking wet roads that Southern California has seen in ages. It forces the coupes to confront some of the actual weather that the rest of the country encounters regularly and serves to even the playing field somewhat between the charismatic rear-drive Mercedes-Benz and the all-wheel drive Audi.
It really is the end of an era for these coupes. The next Audi RS4 is rumored to switch to a twin-turbo V6, and while Mercedes won't officially admit it, the next C-Class AMG will likely switch to a 4.0-liter twin-turbo V8. And we already know the next BMW M3/M4 will rely on a 425-horsepower, 3.0-liter inline-six. Let's enjoy these eight-cylinder German giants while we can, and scroll down to watch the video.

Refreshed A1 packs Audi's first three-cylinder gas engine [w/video]

Back in 2010, Audi debuted the diminutive A1, and it's sold over half a million of them since. Now, more than four years later, the German automaker has given its smallest and most accessible model a facelift and some updated equipment.
The latest version of the A1 benefits from a range of updates, including a sharpened take on the company's familiar styling with a reshaped single-frame grille, new bumpers front and rear as well as new wheel and color choices. But the biggest news is the introduction of Audi's first three-cylinder gasoline engine.
The turbocharged, direct-injected 1.0-liter three-pot churns out just 94 horsepower, but that's still six more than the previous base 1.2-liter four offered, all the while returning better fuel economy and emissions figures. Of course, that turbo three is not the only engine on offer, joining the 1.4-liter turbo four in 123- and 148-hp states of tune and the 113-hp 1.6-liter TDI. And of course there's still the 228-hp S1 performance model. Depending on specification, the engines are mated to a five- or six-speed manual, but can all be optioned with a seven-speed dual-clutch transmission as well.