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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.

Question of the Day: Best recipient for supercharged GM V6?

The good old Buick V6 engine was built from 1961 through 2008 (including a decade of production by Kaiser-Jeep) and went into way too many General Motors vehicles to list here. In 1991, the supercharged version of the 3800 was introduced, with a Roots-style Eaton blower on top, and now you can find these engines in just about every junkyard in North America. The 3800 shares a bellhousing pattern with the also-made-by-the-zillions GM 60° V6 engine, which means that it will install (with varying levels of sledgehammer clearancing and/or axle mix-and-matching) into plenty of GM vehicles that never received the 3800 from the factory. That means one thing: engine swaps! An excellent example of this is the 1992 Chevrolet Lumina APV "Dustbuster" minivan, which is a fully caged high-performance road-racing machine that features a supercharged 3800 and 5-speed manual transmission under its long, vacuum-cleaner-snout-like hood. The RaceVan, in Springfield Monorail livery, will compete this weekend at the Michigan 24 Hours of LeMons race with Autobloggers Mike Austin, David Gluckman, and Alex Kierstein at the wheel. My personal choice for supercharged 3800 power, though, has to be the Cadillac Cimarron, preferably the not-so-sought-after Cimarron d'Oro Edition. Some bashing and welding and cutting and pasting and this lightweight Cavalier sibling could have well over double its original horsepower. So, what's your blown 3800 engine-swap choice? Related Video: Auto News Buick GM v6 question of the day questions engine swap

Junkyard Gem: 1956 Buick Special 4-Door Sedan

Buick was flying high in the middle 1950s, with an all-time sales record of nearly 800,000 cars sold for the 1955 model year alone. Buick stood proud in third place for new-car sales in the United States for 1955 and 1956, behind only Chevrolet and Ford. At this time, both Oldsmobile and Buick built cars on the GM B Platform, with the Buick being the swankier and more prestigious of the two. Here's one of those Buicks, found in a Denver self-service boneyard recently. The list price of this car was $2,416, or about $27,505 in 2023 dollars. Located one step down on the GM Ladder of Success, the 1956 Olds 88 sedan started at $2,226 ($25,342 now). The Oldsmobile had a 324-cubic-inch (5.3-liter) Rocket V8 rated at 230 horsepower, which was serious stuff for 1956. This 322-cubic-inch Buick Nailhead V8 made ten fewer horses for 1956, but it would be bored and stroked out to 364 cubes for 1957 (and was all about land-yacht torque, in any case). A three-on-the-tree manual transmission was standard equipment on the 1956 Buick Special, but this one has the $204 Dynaflow automatic transmission ($2,332 in today's money). The Dynaflow usually gets called a two-speed, but it drove like more of a very inefficient (yet smooth) CVT that had two manually-selected ranges. This car spent too many decades outdoors to have any chance of a restoration. As often happens with cars stored in fields in rural Colorado, someone used this Buick for target practice. The bullet holes look like little VentiPorts. Does the '56 Buick go? Va-va-va-voom!