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Cadillac CT6 uses aluminum to save 200 pounds

In Cadillac's recently launched ad campaign, the luxury brand's tagline is "Dare Greatly," and the two words suggest a brand willing to take big swings, even if they don't always connect. From what the company is promising, the forthcoming CT6 seems like an embodiment of that new motto. With an eventual range of turbocharged engines, reportedly including a turbo V8, a possible plug-in hybrid and streaming rearview mirror, the sedan is certainly pitched as tech showcase. Of course, extensive use of aluminum is practically mandatory to play in the luxury field these days, and Caddy is proving its latest creation can do that too. Despite the weighty appearance of the sedan's squared-off exterior, 64 percent of the CT6 is aluminum, including the entire exterior. Caddy claims that using so much of the lightweight metal sheds 198 pounds off the scales compared to using conventional steel. There still is some steel in the CT6; although it's predominately the high-strength variety. The engineers use the heavier metal for portions around the cabin and B-pillar for added safety. Cadillac also claims using steel "close-out panels" on lower portions of the sedan make the cabin quieter without needing as much sound deadening. The buildup to the CT6's public unveiling has been a long time coming after Cadillac pinned the flagship (for now) sedan's debut at the New York Auto Show nearly a year ago. When the sheet finally comes off on March 31, we get the first good idea about just how great Caddy's latest act of daring really is. Cadillac CT6 Elevates the Science of Mass Efficiency 2015-03-13 Technology DETROIT – Cadillac will use an advanced mixed-material approach for the lightweight body structure of the upcoming CT6 range-topping sedan. The structure is aluminum intensive, but the new Cadillac also includes 13 different materials customized for each area of the car to simultaneously advance driving dynamics, fuel economy and cabin quietness. The CT6 will debut March 31 at the New York International Auto Show and go into production late this year at General Motors' Detroit-Hamtramck assembly plant. "This is the rocket science of automobile construction and manufacturing today," said Cadillac President Johan de Nysschen.

Best sport sedans for 2022 and 2023

SUVs dominate the car industry at every size and price level, but some people still prefer the looks, and more importantly, the performance and comfort, of the traditional sedan. With a lower ride height, lighter weight and generally smaller size, they often are much more fun to drive, and can even be more comfortable. Sport sedans of course lean harder on the performance side of things, and are among the best options for sheer speed and fun, thanks to those inherent characteristics. We've rounded up the ones in the segment that do the sporty dance better than any others in 2024 to give you a handy guide when you're shopping for one of your own. You'll find a wide array of cars here including gas, electric and hybrid powertrains. They'll have manual and automatic transmissions and drive the front, rear or all four wheels. Technically a few hatchbacks have slipped in, but they're close enough in look and feel that we wanted to include them. And excluding them means you might miss out on some of the best-driving options available. You wouldn't want that, would you? Alfa Romeo Giulia Why it stands out: Punchy four-cylinder; astounding power from Quadrifoglio; light and nimble character; awesome shift paddlesCould be better: Clunky infotainment; sub-par switchgear Read our Alfa Romeo Giulia review We start this list with one of the most predictable inclusions: the Alfa Romeo Giulia. Yes, it's a stereotype that the Italian sport sedan is fun to drive, but the fact is, well, it is. The Giulia comes standard with a turbocharged 2.0-liter four-cylinder making 280 horsepower, making it one of the most powerful four-cylinders in the segment. It's paired with a snappy and smooth eight-speed transmission and either rear-wheel or all-wheel drive.  The engine is lively and torquey, if a little short of revs, and the chassis feels super-light. The steering is eager and the car jumps into corners. We also highly recommend getting a version with the enormous and superb aluminum paddle shifters that make clicking through gears much more entertaining. And on the topic of the interior, it's attractive, but the various switches and knobs feels a little cheap, and the infotainment system is clunky. Of course there's also the incredible Giulia Quadrifoglio at the high end. It gets a Ferrari-derived twin-turbo 2.9-liter V6 making 505 hp, and it's rear-wheel drive only.

Mary Barra thinks GM is a leader in autonomous tech

Saying General Motors is "among the leaders" in autonomous vehicle technology, CEO Mary Barra rapped about her company's driverless work in an interview with USA Today. Barra covered a number of topics, including well-known efforts, like Cadillac's upcoming Super Cruise technology, as well as hinting at "a lot of efforts that are confidential." "Things are moving quickly in autonomous [cars] because there's so many different pathways and the standards aren't even set. A lot of people can claim leads because people are making advancements in different areas," Barra said. "Next year we're going to have Super Cruise on one of our Cadillacs. On highways you'll be able to take your hands off the wheel and feet off the pedals – with a very creative way to make sure the driver is alert and involved in the driving process." As for those "confidential" efforts, feel free to speculate. GM has recently confirmed that it'd be running autonomous Volts at its Warren, MI tech center, which certainly indicates that the company is playing with much more than Super Cruise. GM will need to continue to embrace autonomous driving, owing to both traditional competitors like Toyota, as well as non-traditional opposition, like Google and Apple. Speaking of its competition from Silicon Valley, Barra was asked about two of the region's biggest names – Apple's Tim Cook and Tesla boss Elon Musk. "I have tremendous respect for Tim Cook, and I don't really think he needs advice from me," Barra told USA Today with a laugh. And when asked about Apple's future as a "viable competitor," she said, "I have no insights other than what I read in the papers. But it would be foolish for me not to assume that they're going to." As for Mr. Musk's openness about future products and how it contrasts with GM's relatively closed attitude, Barra also gave a chuckle. "I'm sure you would like me to say yes. I think we're fundamentally different. Look at our volume and look at the segments where we compete. His product line – his two products – his scale, it's completely different." The rest of Barra's interview is certainly worth a read, and includes talk about the Volkswagen diesel scandal, GM's changed relationship with the National Highway Traffic Safety Administration, and Uber. Head over to The Detroit Free Press website for the full story from USA Today.