There is a new article discussing the relative merits of the two models in this months edition of GT purely porsche. But the accuracy of the specification of the two models leaves something to be desired with bold statements such as "the 4s has suspension and the brakes of the turbo model" . Actually the C4s has the dampers from the M033 package (lowered chassis) and the springs are also M033 on the front and an exclusive refinement of the M033 rear springs With a rate of 36 N/mm. The anti-roll bars (20mm F / 18mm R) are standard C4 fodder, which practically means a thinner front anti-roll bar(compared to a std carrera 2 ) to promote turn in and reduce under-steer. There is nothing about the suspension that compares with a turbo model. The article goes on the say how the handling and ride are much better than the standard suspension equipped Carrera S model. Wrong again the Carrera S does not have the std suspension of the Carrera coupe, But again has largely the same components as the C4S and an ordinary model (c2/targa/cabriolet/c4 coupe/cabriolet) that was ordered with the factory M033 (lowered chassis) option which porsche state clearly lowers the ride height by 20mm rear and 10mm front for a visual enhancement and does not increase the harshness of the ride at all, hence no increase in spring rate or damper rate, indeed the dampers are only part of the package to stop the short springs from dislocating on full droop by way of a reduced piston rod length. The anti-roll bars of the Carrera S model (21mm F / 18mm R) are the same as all other 2 wheel drive standard variants.
To achieve turbo like suspension on either model requires the optional M030 (sport chassis) to be fitted and even then you don't get the rear springs or rear anti-roll bar of a turbo model.
The brakes of the C4S are not lifted directly from the turbo model but rather follow the form of the four wheel-drive models with their hydraulic brake servo system as opposed to the 2 wheel drive models Vacuum servo. The Discs and calipers/pads are taken from the turbo model, the rest is C4 with a further reduction in Rear switch-over pressure from the C4's 45 bar to 40 bar for the C4S, The turbo is 55 bar and oddly enough the standard 2 wheel-drive models are 40 bar all with a reduction factor of .46 . The brakes feel more powerful because the pedal pressure is multiplied by a factor of 4.8:1 on all four wheel-drive variants and only 3.15:1 on two wheel-drive ones.
The RS model shares the C4 hydraulic system but with a reduction in pressure multiplication to a figure of 3.6:1 ,so evidently the development driver found the four wheel drive settings to be "over servoed".
I believe the "more planted" "less floaty" feel of the C4s model is directly attributed to the extra weight of the car and it's extras and four wheel-drive hardware balancing the weight out more evenly between front and rear. I am sure all owners would agree a full tank of fuel and tyres with a generous tread depth soften the ride of our cars noticeably.
To say that the Carrera S interior is "bog standard" is not quite true. The dashboard and door panels are not covered in plastic, but in a mixture of "leatherette and real leather with a brushed effect only found on the S model.
Come on Carrera S! your not such a poor relation to the Carrera 4 S after all!
The writers who contribute these features to specialist magazines are supposed to be enthusiasts, who you would think would be knowledgeable about the marque, somebody did not do their homework on this one.
Cj
To achieve turbo like suspension on either model requires the optional M030 (sport chassis) to be fitted and even then you don't get the rear springs or rear anti-roll bar of a turbo model.
The brakes of the C4S are not lifted directly from the turbo model but rather follow the form of the four wheel-drive models with their hydraulic brake servo system as opposed to the 2 wheel drive models Vacuum servo. The Discs and calipers/pads are taken from the turbo model, the rest is C4 with a further reduction in Rear switch-over pressure from the C4's 45 bar to 40 bar for the C4S, The turbo is 55 bar and oddly enough the standard 2 wheel-drive models are 40 bar all with a reduction factor of .46 . The brakes feel more powerful because the pedal pressure is multiplied by a factor of 4.8:1 on all four wheel-drive variants and only 3.15:1 on two wheel-drive ones.
The RS model shares the C4 hydraulic system but with a reduction in pressure multiplication to a figure of 3.6:1 ,so evidently the development driver found the four wheel drive settings to be "over servoed".
I believe the "more planted" "less floaty" feel of the C4s model is directly attributed to the extra weight of the car and it's extras and four wheel-drive hardware balancing the weight out more evenly between front and rear. I am sure all owners would agree a full tank of fuel and tyres with a generous tread depth soften the ride of our cars noticeably.
To say that the Carrera S interior is "bog standard" is not quite true. The dashboard and door panels are not covered in plastic, but in a mixture of "leatherette and real leather with a brushed effect only found on the S model.
Come on Carrera S! your not such a poor relation to the Carrera 4 S after all!
The writers who contribute these features to specialist magazines are supposed to be enthusiasts, who you would think would be knowledgeable about the marque, somebody did not do their homework on this one.
Cj
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