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BMW's Z4 M reborn with 500Nm?

2009-12-14 09:20
Vehicle Specs
Manufacturer BMW
Model Z4 SDRIVE35IS
Engine 3l twin-turbo six
Power 249kW
Torque 450Nm (500Nm overboost)
Transmission Seven-speed DCT
Zero To Hundred 4.8 sec
Top Speed 250km/h
Don’t you miss having the option of ordering a BMW Z M-car?

Well, although BMW will not be making an official second-generation Z4 M, it has unveiled a performance biased version of the roadster, which should debut at the Detroit motor show early next year.

Monikered as the sDrive35is, it boosts the N54 twin-turbo 3l six’s power with a similar kit available to local buyers for their 135i and 335i cars.

Liberating the additional power is an engine management upgrade and air intake modification.

The performance power kit is not a simple backyard chipping job, though. It includes an additional radiator fronted by a high-flow fan and additional air intakes for optimal cooling.


BMW's superb N54 in-line six, twin-turbo 3l evens out to neat new power and torque numbers - 249kW/500Nm.

Very respectable output numbers

The sum total is a power boost from 225kW to 249kW and 50Nm of extra torque – now peaking at 450Nm.

For brief (intense) throttle input periods there is an overboost function which allows the turbos to usher in 500Nm worth of peak rotational force. Naught, very naughty.

Thanks to BMW’s seven-speed dual-clutch transmission (featuring a dual-mass flywheel) and the presence of launch-control, the Z4 sDrive35is should charge past 100km/h from standstill in just under five seconds.


No M-sport function button the steering wheel, but then again, this is not supposed to be an authentic M-car...

Small M-styling cues

Other features which make the sDrive35is nearly M-worthy are a 10mm ride height reduction (with adaptive damping) and revised (sharper) electric power steering parameters.

From a styling perspective the M-aerodynamics kit embellishes the Z4 sDrive35is with a slightly tweaked front bumper (outer air-intakes have aluminium detailing) and a two-piece aft diffuser.

The usual range of M-sport cabin trinkets are present too.

This new Z4 sDrive35is might not sport official Z4 M badging anywhere, but for all intents and purposes this is exactly what it is…



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