So, you want something with four-doors, blazing speed and sharp handling? Germany has got you covered. Photos have leaked of the next generation of Teutonic supersedans, giving an insight into a new wave of four-door performance. First up is the BMW M5, which is set to debut at the forthcoming Shanghai Auto Show, displaying the 560 HP sedan in remarkable detail. In response, Audi has let its own turbo-V8 luxury sedan be snapped in testing, even though the S6 shown here won’t be a true M5 competitor, offering “only” around 440 HP. A twin-turbo version making an M5-rivaling 555 HP is said to be waiting for the RS6, as well as a Bentley Continental GT V8. [Gallery after the jump]
Want something a little smaller? Audi has also had a test mule for its RS4 Wagon caught testing, and though its exterior looks don’t betray much, lurking under the hood is the RS5′s V8 making 450 HP. Down the road, says Auto Motor und Sport, the S6′s turbo-V8 could make it into a facelifted version with “no more than” 500 HP (think European release in 2012, US thereafter). Finally, Autobild isn’t sure if the next-generation of C63 AMG Black Series will get the older 6.3 liter AMG V8 “making at least 500 hp” or if it will jump on the new V8 turbo bandwagon, with the CLS63 AMG’s 5.5 liter turbocharged unit, which could easily make over 550 HP. Meanwhile, Porsche now offers a Turbo S version of its Panamera four-door, making 550 HP and accelerating to 60 MPH in 3.8 seconds. And, for a nominal fee, Porsche’s Sport Chrono package will boost the Turbo S’s torque from 553 foot-pounds to 590.
In any case, the new generation of German bahn-burning sedans proves that the Horsepower Wars aren’t exactly over, but have devolved into trench warfare. With the advent of the turbocharged V8 as the standard for performance sedans, the Germans are getting more power while keeping an eye on European carbon emissions standards. With both large and small sports sedans coming from each of the three German luxury brands with 500+ HP, it seems that the glory days of supersedans have a new lease on life.