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Lexus to use BMW 3.0-liter straight-six in next-gen IS sedan?

Here's a rumor so wild it needs a U.S. Fish and Wildlife permit. Japan's Best Car magazine reports that the next-generation Lexus IS will offer BMW's B58 3.0-liter inline-six as one of four powertrain options. That's the same engine found in the new Toyota Supra with 335 horsepower and 365 pound-feet of torque. What's more, the fourth-gen IS will resurrect the IS F model gone AWOL during the current third generation, and do it with the twin-turbo V6 from the Lexus LS 500. The current TTV6 makes the same 416 hp in the LS 500 as the 5.0-liter V8 did in the first Lexus IS F 12 years ago. According to the magazine, the other engine options would be Toyota's 2.0-liter turbocharged four-cylinder, a 2.5-liter for a hybrid model, and a 2.4-liter turbo. We don't know where that last engine fits in. BMW doesn't make a 2.4-liter, and Toyota appears to have retired all of its 2.4-liter applications. Ignoring that, the 3.0-liter straight-six looks like it would replace the current 3.5-liter V6 rated at 311 hp and 280 lb-ft. This wouldn't be the first time the Supra's engine has been ported to the IS. Lexus mavens will remember that two years after the introduction of the original IS in 1998, Lexus put the Supra's 2JZ 3.0-liter straight-six engine in the IS 300 — without the turbochargers, thank you. But Best Car's prediction would have zero relation to history. Those were both Toyota engines back in 2000, and even ignoring the power differential, the IS didn't compete with the Supra. Putting BMW's 3.0-liter in the Z4 and the Supra works because they are the same car. And again, even ignoring the power differential, the more powerful Z4 doesn't compete with the Supra. Best Car's scenario has BMW selling one of its best engines for use in a direct competitor to the 3 Series. Lexus would need to design an engine bay long enough to swallow an inline-six, not a bread-and-butter engine for the brand, yet still be sensible for three more compact powerplants. Then, assuming BMW and Toyota made the same deal as with the Z4 and Supra, the Lexus would be down by a healthy double-digit horsepower margin on its German foe. The new Supra gives up 47 hp to the roadster. Where's the upside? It's said the trim sedan will stay about the same size, on a wheelbase roughly four centimeters longer, but lose a substantial chunk of weight.

Lexus IS sedan refreshed and restyled in Beijing

The current IS with its polarizing sheetmetal has been for sale since 2013, and Lexus has now updated the styling, turning it up a notch. The new IS has a mouth that is perhaps even more gaping than the outgoing model's front end. The intakes have been enlarged, making the front bumper more aggressive even on the IS200t base model. Along with a reshaped spindle grille, the headlights have been redesigned and now feature L-shaped daytime running lights. The checkmark-shaped "light guides" underneath them have also been made more pronounced. Lexus says they have reached for a design that would make the car look like it's in constant motion even when sitting still – perhaps a design cliche, but often attempted, and the character line on the sides has been enhanced for that reason. Did they succeed? You be the judge. Inside, the central information display has grown from 7 inches to 10.3, along with getting higher resolution. Otherwise, the interior remains much as it was. There are small touches here and there, including a redesigned gauge cluster, but mostly it's all about new color choices. On the engine front, the lineup continues to rely on three engine choices. The IS200t carries on as the downsized base four-cylinder option with a twin-scroll turbo charger and cycle-shifting Variable Valve Timing-intelligent Wide – still good for 241 horsepower. The IS300 gets a 255-horsepower V6 and the top-rung IS350 offers up 306 ponies from its 3.5-liter V6. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. New Lexus IS Debuts at the 2016 Beijing Auto Show BEIJING (April 25, 2016) -- A daring new styling direction, exciting performance and innovative technology defined the completely new Lexus IS that was introduced in 2013. Since then, sales of the luxury brand's entry-level sedan have surpassed expectations, outselling the previous-generation model, which was very popular in its own right. At the Beijing Auto Show today, Lexus has taken the covers off the new IS, armed with a fresh new look and a number of important changes. Because the original styling of the current IS has proved so popular, Lexus has kept the essence of car's exterior appearance intact; however, the entire front fascia of the new model has undergone a transformation, highlighted by new headlamps, large air intakes in the front bumper and an evolution of Lexus' spindle grille.

This is what a Lexus RC-based 'four-door coupe' might look like

It feels like there is a secret law in Germany mandating that every domestic automaker there must offer at least one model with a four-door coupe bodystyle like the BMW Gran Coupes, Mercedes-Benz CLS and Audi A7. Several of the German brands even have the swoopy sedans in multiple sizes. So far, Lexus has stayed out of that fray, but maybe not for long, if a recently spotted test car makes it to market.
The brand is known to be testing a highly styled four-door coupe, roughly the size of the GS, under heavy camouflage. Little is known about the new model at the moment, but its existence makes sense. If it really wants to take the on Germans, Lexus is going to have to fight them toe-to-toe with competing models - especially with ones understood to have high margins.
Pictured above is a rendering from artist Theophilus Chin imagining a slightly smaller take on the genre based on the RC coupe, which he calls the RC GT. His design leaves the original shape almost untouched, but shortens the front doors to allow room for a rear doors under the arching roof. His GT would be aimed more against the BMW 4 Series Gran Coupe and rumored Mercedes-Benz C-Class four-door coupe, rather than the larger models Lexus actually appears to be targeting with its vehicle under development. His concept certainly nails the look, though, and while it might not have a basis in reality, we thought that it's well-resolved enough that you'd want to take a look, if only as a "what could've been" flight of fancy.