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Originally Posted by UNKNOWN_370
So which do you prefer in the handling dept.? The Z or 135i
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Stock versus stock the Z wins hands down in the handling department, especially if the Z has the sport package. The 135i is more of a grand tourer than a true sports car. However, with the right suspension mods the 135i can be transformed into a pretty good handling car.
The first thing I did to my 135i was ditch the stock wheels and runflats in favor of larger wheels and non runflat perfomance tires. That helps a bunch. Then I added an M3 28mm front sway bar (from the M3 convertible), M3 control arms and M3 tension rods. Those M3 parts are direct bolt ons to the 1. Next I added M sport springs from a 2011 135i and Koni Sport adjustable dampers. For the 2011 model year BMW switched from progressive to stiffer linear springs on the M sport equipped cars. The car now handles like I thought it should have stock without much compromise in the ride quality. Currently I think my 135i handles as good as a stock sport package 370Z, if not slightly better.
The biggest difference between the Z and the 135i is the motor. The 135i has so much torque, especially when tuned.