1997 Buick Century Custom Sedan 4-door 3.1l on 2040-cars

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Buick Avenir concept struts into Motown

We love auto show surprises, and Buick has already gifted us a sparkly package on the eve of the 2015 Detroit Auto Show. Dubbed Avenir, this four-door concept is said to signal the future of the Trishield brand by previewing a possible flagship sedan. Incorporating time-honored Buick design hallmarks like the sweep-spear profile, Ventiports, and even a subtle boattail rear-end, the four-place sedan is powered by a surprisingly real-world powertrain – namely a next-generation V6 with cylinder deactivation and stop/start, with the most interesting part of the driveline arguably being a "twin-clutch all-wheel-drive system" and a nine-speed automatic gearbox with paddle shifters. Make no mistake, this is a big car. At 204.5 inches long, it's longer than a standard-wheelbase Cadillac Escalade – a span that's emphasized by the car's long hood and waterfall grille – though it's not quite as wide. While clearly a showcar, the beautifully crafted interior looks largely produceable, including attributes like a next-generation 12-inch touchscreen infotainment system and 4G LTE wifi, but we suspect a production car would pick up a third rear seatbelt and give away some of its flowing contours that are said to have been "inspired by nature and sea waves receding on a beach." No word yet on whether there's actually a showroom future for a car like this – it could simply be an exercise designed to test the waters for a next-generation LaCrosse. After all, sedans aren't exactly popular concept fodder these days, especially as crossovers continue to eat into traditional sedan sales in many of the world's markets. However, China still loves the coddling rear seats of a proper four-door sedan (which in this case include silk and bamboo elements), and with a majority of Buick sales happening in the People's Republic, the Asian nation controls the destiny of this General Motors brand. Said another way? Anything is possible, especially with General Motors known to be working on a large flagship sedan for Cadillac already – the Avenir is reportedly based on the same Omega architecture that will underpin the forthcoming CT6. What do you think? Is this a promising direction for the resurgent Buick? Scroll through our gallery, check out the video, and then have your say in Comments.

2018 Buick Enclave slims down for spy shots

Most vehicles are refreshed every five years or so. New technology and styling is required to keep up with the latest trends. Although this cycle is common, there are some vehicles, like the Buick Enclave, that seem to stick around far past their expiration date. We now have spy shots of what appears to be the nine-year old Enclave's replacement. Although the vehicle in the photos is completely covered in camouflage, we can make out the new Buick family grill. There are a set of LED running lights up front and what appear to be a location for foglights toward the bottom. The camo covering is cut in places to allow gaps for sensors, presumably for parking and other driver aids. Out back, the rectangular taillights don't appear to be production ready. The whole rear, especially the glass, looks smaller than the outgoing model, though it is difficult to properly tell through the camouflage. The rear bumper has wide cuts for the dual exhaust pipes, and again the camo has cutouts for sensors. The side profile reveals the biggest change with the new Enclave. The current version shares a platform with the Chevrolet Traverse and the original GMC Acadia, some of the largest vehicles on the market. The all-new 2017 Acadia scaled down in order to compete against midsize crossovers and now has more in common with the smaller, Chinese-built Buick Envision. That doesn't mean the Enclave and Acadia are entirely separate. Both the Enclave and upcoming Traverse will ride on a stretched version of the Acadia platform. The general profile remains the same, but it's apparent that the vehicle in these photos is longer than the new GMC. Most other details are speculation. The Enclave will most likely arrive with GM's 3.6 liter V6. With the introduction of the Envision, the Enclave is expected to move upmarket to compete against the Acura MDX and Volvo XC90. Because of the slightly narrower shape, passenger seating is expected to fall to seven. The new crossover will probably lose a bit of weight with the redesign. The new Buick is expected to debut next year as a 2018 model. Look for the reveal of the Chevrolet Traverse replacement as well. Related Video: Featured Gallery Buick Enclave Spy Shots View 20 Photos Spy Photos Buick Crossover

2019 Toyota Avalon vs. full-size sedans: How they compare on paper

Full-size sedans aren't exactly in great demand at the moment, and at least one of the vehicles in this comparison has been rumored to be on the endangered species list. Yet, we've just had our first drive in the 2019 Toyota Avalon, and if anything has a chance of rejuvenating the segment a bit, it's an all-new version of what has long been the segment's benchmark. To see how the new Avalon compares, we've put together the below spreadsheet featuring the Avalon's primary apples-to-apples rivals, the Buick LaCrosse and Chevy Impala. We also included the Nissan Maxima, which is comparable in price, sales and non-luxury badge, and which offers the sort of increased driver engagement promised by the new Avalon XSE and Touring trim levels. We also included the outgoing Avalon for reference as well as that car's luxury cousin, the Lexus ES, which can definitely be cross-shopped with the luxuriously trimmed Avalon Limited. You can use our Compare Cars tool to create your own comparison, such as one featuring the rear-wheel-drive Chrysler 300, Dodge Charger or even Kia Stinger. Alright, enough chit chat. On to the spreadsheet. Performance and fuel economy The GM sedans may come standard with four cylinders, including a mild hybrid system in the LaCrosse, but puh-lease. The V6 is the name of the game in this segment, with outputs now surpassing the 300-horsepower mark. The LaCrosse is the horsepower and torque champ, though it also weighs a bit more than the new 2019 Avalon, so acceleration is likely to be comparable. The Impala weighs a lot more and has only a six-speed automatic, so despite having a wee bit more power, one should expect it to be pokier (not a good sign for a car rumored to be on the chopping block). One would expect the Maxima's 300 hp and lowest curb weight to result in the quickest acceleration, but then it's also strapped to a CVT, which despite being better than ever, is still a CVT. Things get worse for Chevy when you consider the Impala's base four-cylinder gets the same 25 mpg combined as the Avalon's V6 — once again a segment best. Now, should you really prioritize fuel economy, the 2019 Toyota Avalon Hybrid really stands out with a 43 mpg rating (or 44 with the base XLE trim) that bests the outgoing Avalon Hybrid. Honestly, after driving this new Hybrid, it actually seems like it would be the best bet for most buyers. There's sufficient power, and it only costs $1,000 more than the comparable V6 version.