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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.

Here We Go Again: Lexus attacks EVs in new ad [UPDATE]

UPDATE: We got a comment from founding member of Plug In America Paul Scott on this ad. It's available below. The last time Lexus attacked plug-in battery vehicles in an ad, it had to apologize. The company is remaining on message, though, and has revisited a hybrid-vehicle advertising campaign that implies that driving a battery-electric vehicle is a big waste of time, because of all the charging you need to do. With the new spot, Lexus once again raised hackles of plug-in vehicle advocates because, once again, the accuracy is questioned. "The ad's message was that a consumer could [drive] a vehicle with advanced technology today, without sacrifice or change in habit." – Lexus spokesman Brian Bolain Lexus is running print ads (click to enlarge) in publications like Wired poking fun at EVs, the International Business Times says. Lexus highlights range anxiety in the spot, comparing the amount of time it takes to fully recharge an EV – and the idea that air conditioning and using the radio can shorten an EV's range – to the fun of just driving a Lexus. "The [print] ad was merely intended to paint a picture of life with a hybrid, which is basically no different from life with a traditional gas-powered vehicle, versus life with an EV, which can have challenges or at least uncertainties," Lexus spokesman Brian Bolain told AutoblogGreen. "In other words, at its core, the ad's message was that a consumer could participate in driving a vehicle with advanced technology today, without sacrifice or change in habit." The campaign picks up where Lexus's previous anti-EV campaign left off this spring. A website promoting Lexus's hybrids (and parent company Toyota's H2 vehicles) claimed that there was a hydrogen refueling infrastructure set up in 20 US states (not anywhere close to true). Plug-in advocates were also quick to note that higher-powered EV recharging systems can allow a plug-in to be recharged in far less than the four hours the Lexus site claimed. Of course, Toyota has a lot more skin in the game when it comes to hybrids and, starting next year, hydrogen fuel-cell vehicles than it does for plug-ins. Through August, the company sold just 842 RAV4 EVs and about 11,500 Toyota Prius Plug-in Hybrids in the US. That compares to almost 19,000 Nissan Leaf EVs and a Tesla Model S count that's likely close to that figure as well (Tesla breaks out neither monthly sales numbers nor US-only sales for the Model S).

Chris Harris flogs the Lexus RC F

Chris Harris went to the Monticello race track in New York to sample the Lexus RC F, and, to be honest, he had to figure out how to love it on a circuit. Smitten with the luxury coupe's looks and cabin and naturally-aspirated V8 before taking the driver's seat, Harris found that four laps on track exposed its Achilles' heel: mass. Harris quoted the weight of his car at 1,860 kilograms, or 4,092 pounds, which is about one junior varsity athlete beyond the 3,958-pound curb weight of the coupe we drove. The 478 horsepower and 391 pound-feet of torque couldn't stoke the hustle Harris wanted, removing all the easy friskiness expected from the coveted FR setup, and leading to quick brake fade. He made note of the Lexus' lack of torque compared to the BMW M4, but in truth the RC F is only 15 lb-ft shy of its Munich nemesis. It is, however, at least 400 pounds heavier. On public roads, though, it's a different story. When not being pushed to prove itself in tight spaces, Harris thinks the Lexus is still a "curious blend of things," but a GT whose noise, styling and non-Germanness mean that it "certainly has a place," and might just take time to grow into. Related Video: News Source: Chris Harris on Cars via YouTube Lexus Coupe Luxury Performance Videos chris harris