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Why is there a huge bulge in 2021 Lexus IS 300 AWD's driver footwell? We explain

After an initial turn a few weeks ago for the 2021 Lexus IS first drive review, the revised luxury sedan has returned to the Autoblog garage for a second look. This middle-of-the-road IS 300 AWD pairs a 260-horsepower V6 with a six-speed automatic transmission and four driven wheels, and frankly it's the least interesting way to spec out the redesigned sedan. While there are cars in this segment designed to get a performance boost from their all-wheel-drive systems even in dry conditions, the IS isn't one of them. Adding insult to injury, you get stuck with a cramped driver-side footwell care of the engineering shenanigans that went into making this system possible.  While we've mentioned this particular compromise before, we rarely touch on the reasons why it exists in the first place. The fundamentals are fairly obvious; the standard IS utilizes a longitudinal, rear-wheel-drive powertrain. As is typical with this configuration, the transmission sits in a tunnel beneath the center console. This arrangement works just fine, provided you don't need to power the front wheels.  To do so in a traditional car like the IS requires a literal end-around maneuver involving the engine and transmission, which we've diagrammed for you below care of MSPaint. This is a bit simplified for the sake of this write-up, and it should be noted that this is not the only way to implement AWD in an inherently RWD platform, but it illustrates how the power for the front axle (red) and rear axle (blue) flows from the transmission to the drive wheels. To get juice flowing to the front axle, Lexus had to add a parallel output shaft, exiting the transmission from the front with enough clearance for the bell housing and engine, which sits between the transmission and the front differential. This requires quite a bit of lateral reach, meaning the housing has to extend much farther out than usual to accommodate it (yellow arrow). As a result, the all-wheel-drive transmission looks a lot like a sci-fi gun with a chunky drum magazine hanging off the side of it. The hump (above right) in the footwell is there to clear this protrusion. This basic configuration isn't unique to Lexus. In fact, if you look at a BMW xDrive cutaway, it's similar. So, why no "hump" in other cars? There are multiple factors, but to boil it down to what is most relevant, it's a combination of the resulting shape of the Lexus transmission housing and the size of the IS chassis.

Lexus nixes RC convertible in favor of LS-based 3-row crossover [w/poll]

When Lexus unveiled the LF-C2 concept at the LA Auto Show last week, it did two things: it previewed the direction in which the Japanese luxury automaker's design department was looking for the immediate future, and it previewed a cabrio version of the RC coupe (to replace the IS Convertible) on the other. But the latter, according to new reports, was ruled out before the concept ever took the stage. Although the prospect of a convertible version was engineered right into the RC coupe's chassis, Motor Trend reports that plans to put such a vehicle into production were met with hostility by Lexus dealers, who were offered a two-door convertible instead of the three-row crossover they've been lobbying for. As a result – and with a finite amount of development bucks on hand – Lexus is reportedly listening to its dealers, axing the RC Convertible program and proceeding instead with a seven-seat crossover. Plans to stretch the RX were reportedly ruled out, so Toyota is reportedly proceeding instead with a new model to be based on the LS sedan. The new model would take aim at the likes of the Mercedes GL, Audi Q7 and Infiniti QX60 when it arrives in three years as a 2018 model. It's not the first time we've seen Toyota listen to dealers asking for a high-end people-mover: Earlier this year, dealers in Japan asked the automaker for a luxed-out minivan, prompting it to build the Esquire van just for the Japanese Domestic Market.

Anything but boring | 2018 Lexus LC 500 First Drive

This is it, the headliner, the main event. After years of Lexus promising to make less-boring cars and instead giving us countless spindle-grille facelifts, the 2018 LC 500 is here as the brand's new North Star. It's the official halo to mark where Toyota's luxury brand is headed. This is the car that we hope can bring an end to the relentless mentions of boring cars - which are themselves needlessly boring. And besides, "not boring" is a terrible metric for evaluation. What Lexus is really trying to do is give its cars some spirit, to transcend the paint-by-numbers stereotype that made this brand the luxury juggernaut it is today. By that yardstick, the LC 500 is a success simply based on how it looks. It's beautiful in a way that we couldn't predict from the 2012 LF-LC concept that foreshadowed it. The kind of beauty where instead of reflexively grabbing your phone to take a picture, you just stand there and keep looking. And pictures don't do this car justice, anyway. They soften the edges and reduce the massive draw of the wide shoulders. In person, looking straight at the LC, the car looks like it's 80 percent hood. In the rest of the lineup, the trademark Lexus grille's execution ranges from caricature (RC) to botched nose job (LX). Here it pulls everything together. From every other angle, the LC has some feature that seems excessive – in the best way possible. The proportions of the LC give off a distinctively functional vibe, and it's genuine. That hood is so long because the 5.0-liter V8's center of mass sits three and a half inches behind the front axle. The extra space up front is mostly empty - Lexus uses high-strength steel cross-braces to shore up torsional rigidity instead of adding structure ahead of the front wheels, and the battery sits under the trunk floor. For all the visual excitement, the LC is still a conventional vehicle. Aside from some advancements in the LC 500h's hybrid powertain, the innovation here is of the iterative type. It's interesting, in that Lexus is betting on emotional appeal and driving character at a time when the future relevance of both is up for debate. If anything, the LC is a car for the current automotive world, not the one to come. And despite extensive use of aluminum and sheet-molded carbon, the LC 500 weighs in at a hefty 4,280 pounds. That's right in line with the BMW 6 Series and a good deal below the Batali-esque Mercedes-Benz S-Class Coupe's 4,700 pounds.