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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.

MT digs deep, learns more about hot Lexus RC coupe

As we patiently wait for the all-new Lexus RC to be unveiled at the Tokyo Motor Show in November, Motor Trend has dug up some tasty info on the Japanese automaker's new coupe for us to discuss. While we already knew some speculative, but credible, details on the upcoming two-door Lexus, MT reportedly has the dish on some details of the hotter RC F coupe (shown in the spy shots above).
The article says that the F will carry a six-figure MSRP and use a 455-horsepower, 5.0-liter V8 with cylinder deactivation, mated to an eight-speed automatic transmission. Carbon fiber body components will help reduce curb weight, and the scooped hood is said to optimize aerodynamics as the car will reach a top speed of around 186 miles per hour. Specific high-speed handling improvements include specially developed Brembo brakes, a beefed-up suspension, Michelin Pilot Sport PS2 tires and an automatic decklid spoiler.
As for other RC models, MT mentions the hybrid and V6 variants we already heard about, but it also says that the car could get a 2.0-liter turbo engine. This will probably be the engine used in the base model, which is expected to start at around $40,000. Head on over to Motor Trend for the full article, including a rendered image of the RC F.

Lexus LC 500 stands apart from the go-fast sport luxury crowd

We at Autoblog, by and large, love the LC 500. For its concept-car looks, derived almost verbatim from the 2012 LF-LC concept. And for the charming V8, which growls and burbles appropriately but doesn't subscribe to the faux-backfire trend. Our Editor-in-Chief, Greg Migliore, perfectly summarized the LC 500's appeal when he drove it recently: "Evening walkers cast curious glances. A guy in an old pickup almost sideswiped me as he gawked while taking the corner fast. It's a celebrity car. It also sounds good; the 5.0-liter V8 growls and rumbles. Style and muscle. An excellent execution." I just spent a week in it, my first encounter with the car, and it made me think most about how it's positioned in the Lexus lineup. Notably, it's not positioned as the performance extreme. This is refreshing, because not every car needs to attempt a Nurburgring time. If you want to hunt road-course records in this day and age, it takes massive power and massive traction. We're getting to the point, perhaps well beyond it, where that is doing the stopwatch more favors than the driver. Part of this is decades of marketing putting the sportiest variant of a particular vehicle above the most luxurious in the pecking order of regular vehicles, which doesn't make a ton of sense if you think about it. In the 1960s, the ultimate Mercedes-Benz was the 600 Grosser limousine, which was built like a Rolex bank vault. It had a huge engine, but the point was to move the massive thing around, not for the sheer pleasure of it. Ironically, the Grosser's engine made its way later into the 300 SEL 6.3, turning a large and luxurious sedan into a surprisingly capable bruiser, and then into the Rote Sau race car. Arguably, this was an impetus for the sort of sporty arms race I'm decrying. (Now, when you talk about supercars, or ultimate luxury cars like a Bentley or Maybach, this distinction makes less sense. But let's limit our discussion to vehicles the well-heeled average consumer could actually purchase — things at the upper end of the ranges of normal car manufacturers.) This takes us to the Lexus LC 500. Unlike Mercedes, whose Mercedes-AMG cars are on top of the regular car pecking order, Audi's RS line, BMW's M Division, and Porsche's various Turbos, the LC 500 is simply a large, powerful car. It's comfortable, it looks interesting, and it has more than enough grunt to get out of its own way. There are Sport and Performance options packages, but there's no LC F or F-Line trim available.