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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.

The 2014 Rolex 24 at Daytona: What we learned, what we saw

Two days after the flag dropped on the 2014 Rolex 24 at Daytona, people are still trying to figure out what it might portend for the rest of the season. In 24 hours, two minutes and 24 seconds, 695 laps were completed by the car that crossed the line first. During that time, 67 cars began the race, 18 of them retired. There was that accident, and a red flag. There were supposedly slower classes beating supposedly faster classes. There were 16 caution periods, including that yellow flag. And then there was The Decision. And Then The Uproar. And then The Reversal.
There was also some pretty good racing, so let's have one last look at the weekend. Oh, and there was that 1964 Ferrari 250 GTO Series II...
If you want to skip the reading bits and go to the photos, there's a high-res gallery of 158 images above and a couple more below. Enjoy.

Audi SQ7 TDI would make a compelling option in the US

Intrigued by the prospect of the new Audi SQ7 TDI? We are. And promising though the signs may look, we'll likely still have to wait a while before Audi confirms whether it will bring the new performance diesel crossover to North America, much less announce pricing. But based on the sticker just attached in Europe, the SQ7 looks like a compelling choice – if a difficult one to compartmentalize. Audi has priced its new top-of-the-line crossover at 89,000 euros. Adjust for taxes and exchange rates, we'd likely be looking at an MSRP of roughly $86,000 in US showrooms, if and when it gets the green light from Ingolstadt to embark on the the transatlantic voyage. That places the SQ7 above any diesel crossovers we get in the US, but significantly undercuts the large, gasoline-powered performance SUVs we do get – like the BMW X5 M ($99k), the Mercedes-AMG GLS63 ($124k), and the Porsche Cayenne GTS ($95k) or Cayenne Turbo ($115k). The diesel performance version of the Q7 has more direct competition overseas in the forms of the Porsche Cayenne S Diesel and BMW X5 M50d – but the Audi offers a bigger bang for only a little more buck (or euro) than either. Where Porsche offers 385 horsepower and 627 pound-feet of torque for ˆ87.4k, and the BMW boasts 381 hp and 545 lb-ft for ˆ85.7k, the Audi trumps both with a prodigious 435 hp and a massive 664 lb-ft for only a little more cash. The SQ7 also outperforms both by a significant margin, reaching 62 miles per hour from a standstill in a scant 4.8 seconds, versus the 5.3 achieved by both the Cayenne S Diesel and X5 M50d. That places Audi's latest in something of a category of its own, leaving its similarly priced but less potent diesel competition in its wake. And with more torque but less power, it rapidly encroaches on the levels of performance offered by the top gasoline-powered performance crossovers – whose 0-62 sprints range from 4.2 seconds (in the X5 M) to 4.6 (in the GLS 63). The question on our minds is whether Audi will bring the new SQ7 TDI to these United States. Our sources tell us the chances are good, but far from confirmed. Our hopes were further raised by its appearance in the latest Captain America movie. But it's the SQ7's performance vis-a-vis the competition – difficult as it may be to categorize – that has whetted our appetites the most.