Cerbie 4.5 RR Power Characteristic Question

[GerryB]

Do any of you guys know at what revs the 4.5 RR gets maximum HP and torque ? When Cerbie RR was featured in EVO magazine, against the Brabus Merc, the technical specs showed the peak power for the Cerbie was attained at 6000rpm and max torgue at 4500rpm. In comparison, the standard 4.5 it is 6750 and 5500 respectively. I hope this is true, because this could make a hell of a difference acceleration wise.

Thanks in advance.
GerryB.

[GerryB]

Danny,

A couple of months ago, after ordering the RR, I spoke to John Ravenscroft and asked him how much more power I'd get with a RR, and he said approximately 20 - 25 BHP more, around 440 - 445 BHP in total. When he quoted this figure, I automatically assumed power from the flywheel and not at the wheels. I'd be interested to know if anybody has got dyno figures for a standard 4.5 or a RR. I'd estimate for a RR, approx. 350 at the wheels taking into account power loss in the gear box, drive shaft, diff and rear axles.

EVO magazine actually quoted 440bhp@6000rpm and 405LB FT@4500rpm. Again I think this is from the flywheel. If this is true, then there should be a noticeable difference against a standard 4.5 which delivers 420bhp@6750 and 380LB FT@5500rpm.

Regards,
Gerry