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2018 Buick Enclave: How engineers made it larger, lighter, more sophisticated

Buick used the unveiling of the 2018 Enclave at the New York Auto Show to introduce its new range-topping Avenir sub-brand to the world. With fancier interior finishes and exterior details, it's Buick's latest effort to make itself a proper luxury brand (or perhaps re-establish itself as such). However, lost in the Avenir song and dance is the fact that the 2018 Buick Enclave is a (very) long-awaited all-new model regardless of the trim level one selects. Like the Chevrolet Traverse upon which it is based, the new Enclave is bigger than the vehicle it replaces but considerably lighter, by about 400 pounds. "We told every engineer, 'get your job done, but then take the weight out,'" said engineer Rick Spina as we hovered next to his larger yet lighter creation. His team therefore set about taking a little bit of weight out from just about everywhere, from using additional aluminum in the suspension to varying the thickness of the frame (thicker in places that needed to be stronger, thinner and therefore lighter in places that didn't). Only about 100 pounds came out of the body with the rest coming from elsewhere. Not only will the reduced weight improve fuel economy (Buick-estimated at 19 mpg combined with FWD versus 18 for the 2017 model) and presumably the old Enclave's rather ponderous handling, but it should only make things easier for the new powertrain: General Motors' now-familiar 3.6-liter V6 and its latest nine-speed automatic. With 302 horsepower and 260 pound-feet of torque, Buick says the new engine will need 7.2 seconds to reach 60 mph with FWD or 7.5 seconds with AWD. That's a second quicker than before. Besides acceleration, towing is also bumped up by 500 pounds to 5,000. For those models with all-wheel drive, the Enclave has the same basic system featured on range-topping versions of the Buick LaCrosse. Besides power being sent front and rear, it can also differ from right to left in the back, although Spina is quick to point out that capability is for traction-enhancing purposes rather than sporty, handling-enhancing torque-vectoring ones. Buick owners already appreciated the Enclave for its quietness so the engineers decided to take it that much further. This included altering the exhaust, improving body sealing (there are triple door seals), including active sound deadening and utilizing advanced materials that absorb sound as opposed to simply being thick, dense and heavy enough to keep it out.

Buick really wants us to know the new Cascada convertible won't leak

Quality testing on the factory floor is nothing to joke about. Automakers need to make sure the work being done is up to snuff, and that means some extensive checks. For Buick, that means using a lot of water for each of its Cascada convertibles. Each vehicle that rolls off the floor is subject to a high-pressure, ten-minute soaking that sprays nearly 20 gallons of water from each nozzle during every bath, just to guarantee the fabric roof hasn't sprung any leaks. For some reason, Buick has chosen to show off this testing with the help of what we imagine is the Gorton's Fisherman's baby cousin. Check out the strange testing video, available up top.

Buick envisioning a refreshed Envision crossover

Buick's first fully Chinese-built vehicle in the U.S., the Envision crossover, is now getting its very first refresh. Cars grow up so fast, don't they? There's no time to be wistful, though, so we need to take a look at this prototype. It looks like the Envision refresh is going to be very mild and focuses on strengthening the family resemblance between it and other Buicks. The waterfall grille now has a horizontal bar that intersects with the badge, as seen on every new and updated Buick since the latest LaCrosse. And although that badge is covered, we wouldn't be surprised if it changes from the all-silver design to the classic red, white and blue version that was reintroduced on the LaCrosse. The lower grilles have been changed, too. The outboard grilles that house the fog lights look smaller and less pronounced than on the current model, and the center piece appears to be thinner and wider. It also more naturally merges into the plastic air dam. The tail of this Envision, though more heavily camouflaged, also shows some minor updates. The most significant of them are the new taillights. They appear to have a similar boomerang shape as those on the LaCrosse, a distinct change from the ovular units of the current model. The lower edge of the bumper seems to have more of a faux diffuser look, and the exhaust tips now blend into the shape of the bumper, rather than ending in simple round shapes. Since this update is clearly a mild one, we would expect to see the new Envision on sale sometime next year, probably as a 2019 model. It will join a rather fresh Buick lineup alongside the new Regal and Enclave. Related Video: Featured Gallery 2019 Buick Envision Spy Shots View 11 Photos Image Credit: KGP Photography Spy Photos Buick Crossover Luxury buick envision