Driven by engine rather than exhaust gases, the supercharger has to burn extra fuel to provide similar power to a turbo, and in era where saving energy is next to godliness, the supercharger can no longer compete. It is no surprise that the new W212 E-class range currently comes with turbocharger eg: E200 CGI,E250 CGI,E350 V6 turbocharged...etc
Turbo have always been in the a ascendancy for diesel engines, partly because they work within a relatively narrow range which reduces problems with turbo lag and Kompressor stall, and partly because diesel s are not prone to detonation as they run at much higher pressures. But the turbo’s expansion in mainstream petrol engine design has been much more recent.
Until very recently we could enjoy supercharged 180K, 200K, and 230K engines across the C,E,SLK, and CLK-class ranges. As well as the legendary 55AMG V8 in E,S,SL,CL,CLS-classes . but the only new Kompressor models now in the Mercedes range are C-class and CLC-class, while the SLK only has 200k unit. and these may soon be no more.
Advantages :
-Immediate pick up during acceleration.
-They produce additional power from much lower engine speeds and do not suffer from the inherent lag of turbo.
Disadvantages:
-There will be extra noise and decrease in fuel economy as high amounts of boost are produced from the supercharger
-There is a very slight power/efficiency loss because it is driven by the crankshaft, reducing the efficiency only until the compressed air travels from the supercharger into the intake manifold.
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