I think part of the reason why superchargers make more torque is because they usually run off of the crankshaft (at least an Eaton Roots-type). Boost increases relative to the RPM increase. There is little in the way of lag because the typical roots-type is mounted directly on the inlet manifold, unlike a turbocharger which has to spool up and pressurize a lot of piping before there's any boost created. I'm no expert in the subject but I do have a general understanding of both systems. I'm sure Sami can give you a more detailed explanation.
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Most likely the text in bold is the answer; Lets wait for sami bhai to autheticate what you wrote!!
BTW...speaking of turbo's and supercharger's I just drove the 600hp Bentley Continental GT speed...0-60 is around 4.3 sec and torque is 553lb-ft. The engine is a twin-turbo W-12. I also drove the Bentley Brooklands which has a 6.75-liter twin-turbo V8 motor which makes 530-hp and get this...774lb-ft of torque, no other standard production V8 in the world makes as much torque. The 0-60 is 5.0 seconds, which is respectable since the car weighs 5800lbs. The last car that I drove yesterday was the Lotus Exige S 240 which has a supercharged Toyota 4-cyl motor that makes 240-hp and 170lb-ft of torque...just an incredible car. All in all it was interesting driving one of the lightest and the heaviest British cars in one day. More in the detailed driving impressions.
Bentley Brooklands with ample amount of torque; Lately i've read on multiple website that Car Manufacturer's are soon going to stop posting number in BHP instead it would be replaced by TORQUE....That was the most strange new I have read..But sionc eyou have drive the same car one with mor eBHp then Toqrue & other with more Toqrue then BHP....what wa sthe difference of feel in one and another...
I am quite certain the feel/response in the acceleration will be greater in the brooklands then the TT-GT!! Khair what difference did you felt in both?