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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.

Is now the time to snap up a Lexus LFA?

If you missed out on getting a Lexus LFA when it was new, the time might be near to start looking for a less expensive used one. Listings indicate that the cost for the Japanese supercar is finally starting to drop below the original $375,000 sale price. Lexus built just 500 units of the LFA between 2010 and 2012, and around 200 of them came to the US. The supercar's major highlight was the 4.8-liter V10 with 552 horsepower and a 9,000-rpm redline. It's among the best sounding engines to ever hit the street. Since production stopped, LFA prices have generally remained higher than the original $375,000, but as CarBuzz recently found that trend has shown signs of changing. The site discovered a black 2012 example on Craigslist with 2,797 miles for sale in the San Francisco for $369,000. It's quite a beauty, too. Further research shows you can find an LFA even cheaper. AutoTrader currently lists eight of the supercars for sale, including the one in San Francisco. However, another black 2012 example in Florida is just $349,000 with 2,005 miles on it. If you wait around for the right auction, there are even better deals out there. Sportscar Market reported that a White Pearl 2012 LFA went for $335,000 at a Russo and Steele auction in California in June 2015. The buyer got quite a deal because the Japanese supercar had a mere 140 miles on it. Buying a vehicle for over $300,000 is still well out of the reach for most customers, but these listings hint that LFA prices are beginning to fall. The Lexus will never be at the neighborhood used car lot, but if this trend continues, it could make for some interesting shopping. For instance, if the Japanese supercar drops into the $250,000-range, would people consider spending a little more to buy one instead of a well-optioned new Acura NSX? The Lexus' engine certainly sounds better, and the company has no plans for another supercar of that caliber. Related Video:

Lexus LF-NX gets turbocharged second act [w/video]

Don't let its supremely polarizing appearance fool you, this is not the Lexus LF-NX Concept that you (probably) had a strong reaction to when it debuted at the Frankfurt Motor Show. The German version of the concept car featured a variant of the Lexus Hybrid Drive system, while this LF-NX Turbo, well, it has "turbo" in the name, you see?
If fact, the namesake turbo would appear to be the first for Lexus; getting off the line in the forced-induction race with a 2.0T four-cylinder engine that "paves the way for the introduction of turbocharged powerplants in future Lexus models." Sounds good to us. The new turbo four has plenty of tricky tech, too. Lexus tells us that the engine makes use of an advanced high tumble port, fan spray fuel injection, VVT-iw variable valve timing, an exhaust manifold integrated into the cylinder head and, of course, a twin-scroll turbo with active wastegate valve. The result is said to be a blown engine that offers quick throttle response and "exhilarating" performance, along with excellent fuel economy and low tailpipe emissions.
As for the rest of the LF-NX Turbo concept? Well, you've seen this angular concept crossover before, basically. There's a slightly tweaked front end and new wheels sitting in slightly cleaned-up wheel wells. The boldest-yet version of the spindle grille still bears an uncanny resemblance to The Predator, and the slightly revised exterior visuals won't change your made-up-mind about this vision of Lexus' future.