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Originally Posted by soj
No. A step is an auto tranny so it has a converter, which saps about 10% power from the car.
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i must respecfully disagree with your assessment of 10% power drain when it comes to the e90's step. do you have conclusive proof such as proper dyno graphs? it would be interesting to see them if you do. may i kindly ask where you obtained the 10% figure?
i cannot comment on on
other cars except for MB C180, my wifes car. also a massive improvement with auto in current (C180K) model compared with previous model's manual transmission! very nice auto. i do not have any comparison experience with other cars though.
you may very well be right in some cases.
returning to the e90, the efficiency of the engine/auto/chassis package is obviously the best that bmw have offered in the 3 series. in a straight line launch test the manual may just best the auto to the line but i would suggest that combined with hills & curves & hairpins etc, the auto will keep up with the manual with very little difference at the finish line.
sure, in the past, the auto sapped power but the 6 speed with valvetronic and other power saving features like electric water pump all help to minimise power drain to the rear wheels.
yes, i chose manual e36 and e46 over autos due to the power drain and wanting a manual car anyway but it is no longer an issue for me in the e90.
what DID drain lots of power from my old 36 & 46 was the air conditioning - in quite a big was. more of a concern that the auto.
thanks.
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328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.