With many auto makers dropping cylinders off their larger engines Mercedes-Benz was rumoured to be developing a hardcore turbocharged V6. But those rumours have now proved false with news that Mercedes is set to continue with a naturally aspirated V8 engine in the next generation of the SLK AMG.
Details have been released before the new sportscar debuts at the upcoming Frankfurt Motor Show. The latest AMG powerplant, labeled M152, is based closely on the M157 engine that already sees use in the new CL63 AMG and its four-door brother – the S63 AMG. But the M152 is different in a few key areas, first of all, is the removal of the twin turbochargers. It also uses a new air intake, cylinder heads, valve drive, oil system, crankcase and, most importantly, a Formula One-derived cylinder deactivation system. This new system allows it to cut back to just four cylinders when required and with only four pistons firing, fuel economy is markedly improved. Continue reading “Mercedes-Benz reveals variable-displacement V8 engine” »