Cranking up the power

摘要

Turn the ignition key in AMG's S63 sedan and a 6.2-litre V8 roars into life.rnIt's all part of the high-performance brand's allure-large engines in large cars.rnBut AMG can't escape from the need to improve its powertrains' efficiency and emissions. The company announced two years ago that it wanted to reduce its fleet CO_2 emissions average by 30% before 2012.rnThat could've spelled the end for its large-capacity engines, but the tuned S-class won't be disappearing any time soon.