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Singer Porsche, Koenigsegg, NSX: Leno's life doesn't suck

Jay Leno had quite a productive trip this year during Monterey Car Week. Not only did he get to pal around with Ian Callum and check out the Pebble Beach Concours d'Elegance, but the denim-clad comedian also headed to The Quail to talk to some prominent figures in the modern sports car scene. Capping off the fun, he got to take a drive in a Mercedes-AMG GT S, too Perhaps the highlight of this show is a nearly 10-minute interview with Christian von Koenigsegg. The founder of the Swedish hypercar company digs deep into the Agera One:1's engineering details, relating interesting facts about the aerodynamics and transmission. In addition, Leno chats with Rob Dickenson of Singer about its newly reimagined Porsche 911 Targa, and he gets the latest scoop on the Acura NSX's progress from newly promoted Acura Vice President and General Manager Jon Ikeda. If you like hearing about the nuts and bolts of sports car development, then this video can't be missed. Of course, we were there at Monterey, too, and we pointed our own cameras at some of the amazing machinery, both vintage and modern, at all the various car-focused events of the week. Take a look back at some of our own cool footage in the videos below. Related Video:

Honda, Mazda, Mitsubishi, Mercedes also under diesel emissions scrutiny

The controversy over Volkswagen's diesel emissions scandal isn't limited to the US. In Europe, where diesel engines are far more popular, the issue is shining a harsh light on the NEDC emissions test. As already known, the evaluation does a poor job of reflecting real-world production of NOx, and it appears a significant number of automakers are affected. The Guardian in the UK has been reporting on real-world test results from a company called Emissions Analytics. After the latest round of checks, vehicles from Mercedes-Benz, Honda, Mazda and Mitsubishi were found to generate far more NOx than they should. The newspaper also published similar results for Renault, Nissan, Hyundai, Fiat, Volvo, Jeep, Citroen, VW, and Audi. On average, the figures are about four times over the limit of producing the pollutant. Unlike VW and its defeat device, these automakers aren't actually breaking the rules. The vehicles perform up to the NEDC lab test for emissions, but those results simply aren't translated to the street. "The VW issue in the US was purely the trigger which threw light on a slightly different problem in the EU - widespread legal over-emissions," Nick Molden from Emissions Analytics said to The Guardian. A big fight to decide the future of this issue appears to be on the horizon. Automakers claim that they can't meet the next round of tightening emissions regulations and are asking for compromises. Although, spokespeople for Mercedes and Honda told The Guardian that the brands would be in favor of the stricter rules. Meanwhile, some European governments began backtracking their support of diesels well before this scandal came to light. The added scrutiny certain hasn't helped the future of the oil-burner. Related Video:

Mercedes driver Lewis Hamilton buys LaFerrari

Lewis Hamilton has driven some of the fastest cars ever devised, like the McLaren MP4-23 with which he won the 2008 Formula One World Championship, the Mercedes W05 with which he won the title last year, and the new W06 he drove to the checkered flag in the season opener earlier this month. But what does he drive in his spare time? According to the latest reports quoting his boss Toto Wolff, the reigning champ celebrated his win at the Australian Grand Prix by ordering a new LaFerrari. The seven-figure, 950-horsepower hybrid hypercar may be made by a rival manufacturer to the team for which he drives, but then his employers at Mercedes don't (for the time being at least) build anything that competes in the segment – unlike his former employers at McLaren that offer the similarly potent P1. Something tells us he won't be invited to drive it at Fiorano, though - which is something his rivals Fernando Alonso, Kimi Raikkonen and Sebastian Vettel have all had the chance to do. Hamilton has a long-established penchant for driving twelve-cylinder exotic supercars in his spare time. At his previous place of work, he was promised an exceedingly rare McLaren F1 LM – valued at some $4 million – but only if he won three world titles for the Woking-based team. He also owns a Pagani Zonda that was made specifically for him with a 760-horsepower engine (supplied, naturally, by Mercedes) and a six-speed manual – complete with a clutch pedal, which (apart from starting off the line) is something he doesn't usually get to operate during working hours. Related Video: