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Cadillac CT6 beefs up with 400-hp twin-turbo V6

Cadillac's engine lineup is set to get a makeover led by the potent powerplants under the hood of the CT6. Our man Steven Ewing is onsite at an event in Detroit reporting all the details. Here's what we know so far: The CT6's top engine will be a 3.0-liter twin-turbo V6. It's the first twin-turbo with cylinder deactivation, which essentially makes the V6 able to convert to a V4 unit. Power will be 400 horsepower at 5,500 rpm and 400 pound-feet of torque at just 2,500 rpm. No word on what a potential CT6-V would get. The CT6 will also have a naturally aspirated V6 that Cadillac is claiming to be all-new. It's rated at 335 hp at 6,800 rpm and 284 lb-ft at 5,300 rpm. That's an improvement of 14 hp and nine lb-ft compared with today's 3.6-liter V6, and fuel economy increases nine percent. Cadillac says it's the highest output for a naturally aspirated V6 that's SAE-certified and runs on regular fuel. Both of these V6s will have stop/start technology and will be paired to with eight-speed automatic transmissions. The 3.6-liter V6 will also be used in the 2016 CTS and the 2016 ATS. Meanwhile, Ewing reports that Cadillac says the ATS-V is actually more powerful than initially announced, though there are no numbers to flesh that claim out as yet. The brand also plans to offer four- and six-cylinder diesel engines in various vehicles and new V8 options. The CT6 bows at the New York Auto Show. It will use an aluminum-intensive body that reduces weight by 198 pounds compared with a steel setup and continues Cadillac's creased design language used on the CTS and ATS models. The CT6 goes into production late this year in Detroit. Related Video: Cadillac Next-Gen V-6 Engines Led by 3.0L Twin Turbo Segment-leading power, efficiency in world's most advanced six-cylinder DETROIT – Cadillac today announced a new generation of V-6 engines, led by an exclusive Twin Turbo V-6 that will be one of the industry's most advanced six-cylinder gasoline engines. It leverages the latest technology to balance efficiency, performance and refinement in the upcoming, top-of-the-range CT6 luxury performance sedan. The all-new Cadillac 3.0L Twin Turbo is designed to achieve new thresholds of refinement and specific output for the brand's new prestige luxury sedan, which makes its world premiere March 31, at the New York International Auto Show. Production begins late this year at General Motors' Detroit-Hamtramck Assembly Plant.

2017 Cadillac XT5 First Drive

Thousands of feet above the Pacific Ocean, the winding roads that lead to the summit of Palomar Mountain turn from undulating curves to tight, blind, hairpin bends. Most drivers along this route are looking for a chance to exploit the limits of their cars' handling as much as one can on public roads, while taking in the bucolic views and endless blue skies. Up here, taking the thrilling curves at high speed is best left for drivers of performance cars who have platinum health insurance, lest the possibility of rolling a vertical mile toward Hellhole Canyon Preserve (we are not making this up) is not a deterrent. How different the experience is when you've chosen to climb the mountain in the 2017 Cadillac XT5, the crossover that replaces the SRX in a growing lineup of refined and redefined XT-named utility vehicles. An instant reminder that this SUV is not a Lotus comes as we enter a corner with a smidgen too much gusto, the tires begin to claw for traction, and the seatbelts tighten with the grip of sudden death. A quick tap of the brakes releases the belts, but not before a bead of sweat forms on the forehead. The overwhelming feeling is one of being unsure if this exercise is out of the XT5's comfort zone, despite Cadillac's goal of hitting the high-achieving sweet spot of the sport-luxury crossover segment. You'll know that an XT5 isn't an SRX when you first see one, although the differences are harder to tell when the two are parked side by side. The XT5 is the second Cadillac model to arrive since the brand learned to speak with a New York accent (albeit an affected Soho dialect) and it's a key pillar to the brand's chances at worldwide success. In 2015, the final year of sales for the five-year-old SRX, Cadillac managed to sell almost 100,000 of them around the world – no small feat for a model about to be replaced, and proof of the crossover's relative freshness and its popularity in export markets like China. Like the SRX that precedes it, the XT5 will be available with either front- or all-wheel drive (a $2,645 option), but that's one of few commonalities with the outgoing model. A new, lighter chassis helps the XT5 shed about 300 pounds, although Cadillac favors high-strength steel for bodywork and leaves aluminum for the engine and interior trim. In line with the revised brand guidelines for naming, SRX evolved into XT5, leaving room for larger and smaller utility vehicles to eventually join the lineup.

Reuss says Cadillac CT6-based Buick could happen

Could the upcoming Cadillac CT6 and its Omega platform spawn a Buick variant? According to General Motors' product chief Mark Reuss, it could potentially be in the cards, but "not yet." "We're working on that," Reuss told Automotive News at the 2015 New York Auto Show. While there hasn't been a large, rear-drive Buick on dealerships since the Roadmaster in 1996, the company gave a big hint that it could head in that direction with the Avenir Concept, shown earlier this year at the Detroit Auto Show. As Automotive News explains, a rear-drive Omega-platform Buick could be a real hit in China, where consumers buy 13 Buicks for every one Cadillac. That move would be a big help to GM's bottom line, too, as it'd significantly increase the Omega platform's economy of scale. If a large Buick based on the CT6 were to head to China, though, it likely wouldn't be a simple case of badge engineering (thank God). Reuss hinted to Automotive News that while the mixed-material construction of the CT6 platform "is very flexible," doing an "identical version of that platform or not is a different conversation." What are your thoughts? Should Buick adopt the Omega platform for an Avenir-based sedan? Should that vehicle be sold here in the US, or should it be a China-only offering? Have your say in Comments. Related Video: