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Acura TLX caught naked in production guise, can you spot the differences?

Acura doesn't tend to do concept cars these days that don't foreshadow a specific upcoming production model. The ZDX prototype of 2010 previewed the production version, as did the ILX and RLX showcars of 2012 and the MDX of 2013. The NSX concept is on its way to production, as the SUV-X concept is likely to do as well in the coming years. So when Acura revealed the TLX prototype at the Detroit Auto Show a few months ago, we all but knew it would only be a matter of time before that, too, would be produced. And here it is.
Spied all but completely undisguised while undergoing testing, this pair of TLX prototypes (one in white, one in black) looks almost identical to the show car. You might spot a few minor tweaks here and there - the strip of LEDs in the lower front bumper have been replaced by round fog lamps and some of the chrome accents are missing - but by and large, we're looking at the same vehicle we saw in Detroit earlier this year.
The finished production version of the TLX is expected to debut at the New York Auto Show next month, after which it will replace both the TSX and the TL, slotting in between the smaller ILX and the larger RLX in Acura's sedan lineup.

Weekly Recap: Automakers rethink the definition of luxury

Variety is the spice of life, but it's becoming a prerequisite for luxury carmakers in the ultra-competitive US market. The Detroit Auto Show was strong evidence of this reality. It's not enough to offer attractive and well-appointed cars and SUVs anymore. Luxury brands that want to be competitive need to invest in everything from high-powered supercars to clever hybrids. To be relevant, you need to be green and mean – and everything in between. As General Motors product chief Mark Reuss said after the reveal of the 640-horsepower Cadillac CTS-V: "We are not leaving anything on the table." He was speaking for Cadillac, but he might as well have been speaking for the luxury car market. The CTS-V debuted in Detroit about an hour after Lexus surprised showgoers with the reveal of the RC F GT3 race car and then announced ambitious plans to return to competitive racing. That almost overshadowed the fact Lexus had just revealed another potent addition to its growing F line, the 467-hp GS F. View 20 Photos But for luxury brands, it's not just about maximum horsepower for well-heeled enthusiasts or decadent amenities for the Grey Poupon set. Strong competition from all corners has forced automakers to refine and expand their lineups in ways unforeseen even a few years ago. Case in point: Mercedes-Benz finally has an answer to the BMW X6, rolling out the GLE coupe in Detroit. The X6, which blends coupe-like styling cues with some of the functionality of an SUV, debuted in 2008. Back then it was a punchline, but seven years and more than 260,000 sales later, the X6's success has compelled Benz to respond. Mercedes – one of the strongest proponents of diesel technology – also debuted the C350 plug-in hybrid sedan, which promises a range of 20 miles on electricity, though fuel economy figures were not announced. The car pairs Mercedes' well-received 208-hp turbocharged four-cylinder with an electric motor for total output of 275 hp and 443 pound-feet of torque. Meanwhile, Infiniti will add the Q30 hatchback to its lineup by the end of the year, new president Roland Kruger reiterated in Detroit. It's expected to be joined by a crossover variant, and the additions will help strengthen Infiniti in the United States and abroad. "While we're expanding our product line, we're also expanding our market reach," he said. That's something echoed by Jaguar executives, who are preparing to launch the brand's first crossover, the F-Pace, in 2016.

Go inside the Acura NSX's stunning Ohio factory

If you're going to build a world-class supercar, you need to build a world-class factory. And that's what Honda did with the Performance Manufacturing Center in Marysville, Ohio. We took a tour of the PMC recently for an up-close look at how the new NSX comes to life and documented it in the video above. The PMC was designed for the sole purpose of building the new supercar. Located just up the road from the R&D center where Honda developed the NSX, the factory sits at the heart of Honda's Ohio campus. Walking the factory floor, you can tell the Acura NSX is the pride of the entire Honda Motor Company, and as we saw on our first drive, it's a car worthy of serious lust. So it's no small thing that the Japanese company builds the entire car in America. The factory won't be open to the public, but if you're one of the people with an NSX on order, you'll be able to take a tour yourself later this year. We hope you enjoy the video tour. Related Video: Green Acura Coupe Hybrid Videos Original Video