AMG Action! Mercedes eyes new naturally aspirated V8

Mercedes-Benz has selected the twin turbocharged 5.5-liter V8 engine to power the recently unveiled S63 AMG, CL63 AMG and CLS63 AMG, with ratings between 525 hp and 577 hp. But it's going to be a different story for the successor to the SLK55 AMG set to be revealed at next year's Frankfurt motor show. Sources within the Stuttgart headquarters suggest the new performance roadster is earmarked to receive a yet-to-be revealed naturally aspirated version of Mercedes-Benz's new 5.5-liter V8.

Future products: Infiniti adds models at top, bottom of lineup

In an effort to broaden its product coverage, Infiniti will launch a more expensive model and a less expensive one. The brand also will get two alternative powertrain technologies next year. G25: The luxury marque's entry-level sedan will go on sale this month in a bid to reach deeper into the near-luxury segment.

Jeep Grand Cherokee SRT8 costs £58,995

Jeep Grand Cherokee SRT8 - perhaps the best value for money super SUV Jeep has announced that the most powerful new Grand Cherokee – the SRT8 – will cost £58,995 in the UK. The 2012 Jeep Grand Cherokee looks to be a very good effort from Chrysler, and it has a real fighting chance of seriously taking on the luxury SUV models from Europe. But one model really stands out – the Jeep Grand Cherokee SRT8.