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      12-19-2013, 11:08 PM   #78
V8FunNaturally
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Drives: Regensburg Factory E92M3
Join Date: Jan 2012
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Quote:
Originally Posted by Jason View Post
[bpnews="Comparison: F82 M4 versus E92 M3"]
Jason, the performance part of this comparison as you are presenting it is futile as long as what truly differentiates the two cars is not taken into account. That is the character, response and refinement of the engine. For example comparing a NA engine HP to a turbo engine HP is missing a whole dimension and that is when and how early in time after pressing the pedal do you get that power measured in quantified numerical way. And, does the car have to be in a lively driving bout previously in order to get it all so that the turbo lag can be masked ? how is the car behaving when that turbo turbine is not spinning fast enough is it going to behave like a puny 3.0 liter engine with low static compression ? Those peak horsepower and peak torque are useless (curves also) if not taken in conjunction with the throttle response at every RPM.

I have to say politely that the way you are approaching the comparison is biased. Since everything that makes this M4 undesirable is not transpiring (throttle response, artificially "enhanced" engine sound in the cabin, electric steering). What makes this M4 questionable is the engine of course but also there are big questions about reliability of a 335is inspired engine platform for a track car. And what about direct injection related issues like blow off gases leading to carbon deposits on the intake valves. This is a well known problem of this type of engine configuration and it will eventually rob the engine of its power unless taken apart for active cleaning.
The advantage of a NA engine is that the throttle response is there all the time, you get that peak power instantaneously. Even if a turbo engine had an ideal response it can only approach the NA engine response but in reality it never does because forced induction is a compromise of natural throttle response and linear engine power delivery for torque and smaller displacment. The torque curve presented sofar are single dimensional (only RPM is considered) and always assume max instantaneous torque which is simply never the case for a turbo engine. This is a trump comparison. ( I am not talking about looks, which is a subjective thing).

Last edited by V8FunNaturally; 12-19-2013 at 11:31 PM..
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