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Infiniti Q50 Red Sport 400 priced at $48,855, AWD at $50,855

Infiniti's most powerful production model, the new Q50 Red Sport 400, now has a starting price. You'll need at least $48,855 for the rear-drive model or $50,855 for all-wheel drive. (Both figures include the $905 destination charge.) A fully loaded, rear-drive Q50 RS400 with Direct Adaptive Steering, navigation, adaptive cruise control, a heated steering wheel, and Infiniti's entire alphabet soup of safety equipment, tops out at $57,045. (Again, add $2,000 for AWD). When it comes to rear-drive competition, the closest base price to the Q50 is the 320-hp BMW 340i. This German undercuts the Infiniti by two grand, $46,795 to $48,855. But the BMW outprices the Q50 as soon as you start selecting options. A 340i with similar equipment to a loaded Q50 Red Sport 400 costs just under $60,000. All-wheel-drive German competitors also lose out in the price war. Like with the rear-drive models, the BMW 340i xDrive undercuts the Q50 RS400 by around $2,000. Add the options, and the Infiniti becomes a better value. The other two big German rivals, the Audi S4 and Mercedes-Benz C450 AMG start at a higher price and only get more expensive. Technically the S4 starts cheaper than the Q50, but only with the standard manual transmission. Selecting the S-Tronic dual-clutch model kicks the price from $50,125 to $51,125, and going for the top-end Prestige trim will bump potential Audi owners up to $57,025. Throw on must-have S4 options, including adaptive cruise control, adaptive dampers, and a sport differential and you'll be shell out $64,425 for the Audi. The Mercedes-Benz C450 AMG is the priciest choice in this group, starting at $51,725, or roughly $900 more than a base Q50 RS400 with AWD. Options, again, are the downfall here. Building a C450 to match a loaded Infiniti will drive the Mercedes' price up to $64,315. While it occupies something of a weird space relative to these vehicles, it's also worth mentioning the Cadillac CTS VSport. It's the only car in this impromptu pricing comparo that can outgun the Q50, with its 3.6-liter, twin-turbo V6 good for 420 hp and 430 lb-ft of torque. It also starts at $60,950, although that includes plenty of standard equipment. All this means that the Q50 Red Sport 400 represents a relative value. It packs more power than the Germans – 80 more than the 340i, 67 more than the S4, and 38 more than the C450 – and a more comprehensive list of options, too.

2014 Audi RS7 is a 189-mph terror

If you have a burning desire to take yourself and four friends to 189 miles per hour, the 2014 Audi RS7 Sportback can help you out. The luxury hatchback bowed at the 2013 Detroit Auto Show today, complete with a 560-horsepower twin-turbocharged 4.0-liter V8 engine thrashing under the hood. Getting to 62 mph takes a shave under 3.9 seconds thanks in part to the 553 pound-feet of torque on hand from just 1,750 rpm. While the base car comes with an electronically limited top speed of 155 mph, customers can request the governor be removed by purchasing the dynamic package plus, upping the V-max to 189 mph.
Ludicrous? Sure, but Audi says the RS7 can also yield up to 25 mpg on the US scale. With a cylinder-on-demand system, the V8 can deactivate up to four cylinders by closing their valves. Once the driver gets frisky with the throttle, the engine automatically kicks from four-cylinder to eight-cylinder mode in a few hundredths of a second. The engine is bolted to an eight-speed automatic transmission, which pushes power to all four wheels. You can read the full press release below for more information, but we think you'll have a better time viewing our live shots from the show floor..

Audi pins hopes on 2016 R18 Le Mans prototype

Down but not out, Audi is carrying forward its endurance racing program with the new R18 you see here. Unveiled on Saturday at the Audi Sport Finale end-of-season event in Munich, the new LMP1 is billed as the company's its most powerful and efficient race car yet. And it has been thoroughly redesigned to bring the Four Ring brand back to the winner's circle. Though technical details remain a closely guarded secret, Audi says that the latest evolution of the R18 (now apparently labeled sans the E-Tron Quattro) benefits from revised aero, lightweight construction, and "a modified hybrid system with lithium-ion batteries for energy storage, plus an efficiency-optimized TDI engine." That spells the end of the mechanical fly-wheel setup of the previous version, but sticks to the diesel fuel that Audi has championed instead of the gasoline favored by rivals Porsche and Toyota. With all its revisions, Ingolstadt undoubtedly hopes this latest version will perform better than the last. This past season was the worst Audi has endured since 2009. Its sister company Porsche beat it to both the drivers' and manufacturers' titles in the FIA World Endurance Championship and to the winner's circle at the 24 Hours of Le Mans. That marked the second straight year of defeat in the championship, following Toyota's domination last season, and marked only the third time Audi was defeated at Le Mans since 2000, following Bentley's win in '03 and Peugeot's in '09. In order to avoid costly inter-agency arms race, Audi and Porsche have agreed to each field two entries instead of three in both the championship and the headline race in Western France. Audi has yet to confirm its driver lineup, but Porsche has revealed its lineup consisting of defending champions Timo Bernhard, Brendon Hartley, and Mark Webber in one car, and Romain Dumas, Neel Jani, and Marc Lieb in the other. That leaves out the Le Mans-winning trio of Nico Hulkenberg, Nick Tandy, and Earl Bamber, with the former already counted out due to an F1 conflict. More powerful and efficient than ever before: Audi R18 celebrates world premiere in Munich - New hybrid race car for the 2016 Le Mans 24 Hours - Unchanged driver line-up in the DTM - High demand for new Audi R8 LMS GT3 sports car The brand with the four rings will be entering the 2016 motorsport season with the most powerful and efficient race car Audi has ever built.