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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.

2021 Lexus LC 500 Convertible gets an $8K base price increase

When the 2021 Lexus LC 500 Convertible arrives in dealers this summer, it will carry a price tag starting at $102,025, including the $1,025 destination charge. That's $8,050 more than the base 2021 LC 500 Coupe.  As we learned when the droptop LC was revealed at the L.A. Auto Show last year, Lexus did more than simply saw off the roof. Engineers improved chassis rigidity by adding, reshaping and/or relocating structural braces, including the rear suspension brace tower. To counter this, weight is reduced at the rear by using a die-cast aluminum suspension brace, and a unique dampener is used to ensure comparable ride quality as the coupe. Unsprung weight at the front suspension was also reduced. In total, only 217 total pounds were added for the convertible over the 2019 LC 500 coupe. The new soft-top has four layers, and Lexus says its fabric was selected to make sure that it would stay tight and prevent wrinkling. Excellent sound insulation is promised, but Active Noise Control is also employed, whether the roof is raised or lowered, to further suppress noise. The roof is lowered in 15 seconds and raised in 16. A rigid tonneau cover is employed when the roof is lowered. Design changes for the convertible include a trunk lip that's been raised slightly and widened. The center brake light is integrated into it ͖ it's normally above the back window. The beltline and rear molding were also reshaped to suppress wind, while a transparent plastic wind deflector is integrated neatly behind the back seat. Should that not sufficiently keep the chill out, an available neck-level heater has been added to the seats similar to what you'd find in various Mercedes convertibles.  Other feature updates include the addition of Apple CarPlay, Android Auto and Amazon Alexa connectivity, but the LC's version of Remote Touch does not get the RX's touchscreen functionality.  Now, should you really be digging the Structural Blue paint job pictured here, along with the very Santorini-like complementary white interior, know that it's exclusive to the Inspiration Series. It'll be restricted to only 100 units and costs $18,800. Besides the unique paint and interior, the LC's other options are included along with a two-piece set of Zero Halliburton Pursuit Aluminum luggage designed specially for Lexus. Swank.

Lexus LC Convertible might be revealed at the Goodwood Festival of Speed

Lexus reportedly has plans to reveal a Lexus LC Convertible at this year's Goodwood Festival of Speed. The news comes from a Roadshow report, citing multiple, anonymous Lexus sources. One is right to be skeptical, but an LC Convertible seems likely after seeing the concept revealed at the Detroit Auto Show at the beginning of the year. We liked what we saw back in January, and the "concept" looked nearly production ready. Lexus hinted a production version may be on the way, and it looks like we might see the delivery of that car in early July. The Goodwood Festival of Speed runs July 4-7. That concept car was missing a roof, but we imagine Lexus will be fitting a space-saving soft top for the production car. Space is limited in the LC500's small trunk, and a bulky hard top would just about kill it entirely. However, the gorgeous lines of the LC500 will most likely suffer from such a top — it's pretty much impossible to replicate the coupe's sweet lines and styling with a fabric top. The idea of an LC Convertible is sound, though. It makes sense for Lexus to take advantage of the beautiful and exotic design of the LC500 for more models, especially as BMW dives head first into this arena with multiple flavors of the 8 Series. As convertibles typically are, we'll expect this one to be more expensive and slower than the coupe. The LC500 starts at $93,325, including the $1,025 destination charge. Lexus says acceleration to 60 mph with the 5.0-liter V8 takes 4.4 seconds. We wouldn't be surprised to see a price tag arching over $100,000, and a couple tenths knocked off that 0-60 mph time with an inevitably heavier car. The Goodwood Festival of Speed is as good a place as any to reveal something like an LC Convertible. We'll be on the grounds in England when the time comes, so check back to see if Lexus decides to pull the covers off in a few weeks.