BMW M4 Convertible – Twin-Turbo? Yes Please.
With the M4 and the transition to a supercharged engine, BMW is taking a step in a direction that some enthusiasts might not like. However, looking at things with an open mind - and considering the output values and, above all else, the potential of the engine - the M4 puts forward a positive argument for this new technology within this vehicle market.
The Next Twin-Turbo Generation
As often happens with models from Munich, you can hardly feel the two turbochargers. The Bavarians have done it again: they’ve made the turbos so linear you get the feeling of driving with a greater engine displacement.
One disadvantage we must definitely consider: the sound of the M4, at least at the factory specifications, doesn’t even come close to the high revving of its V8 predecessor. However, it still sounds better than most other vehicles. Check out the sound video at the bottom of this news article if you want to hear it for yourself.
Room for Improvement - Even With a Carbon Roof
Back to the most important aspects of this vehicle: power and torque. The serial measurements of the S55 engine installed in the M4 were slightly above the manufacturer's specifications of 432hp and 550Nm.
With the RaceChip Ultimate, our best product in the chiptuning range, we were able to achieve a power increase of 47hp and 76Nm after a few test runs.
Those who previously might have thought the nominal difference in performance wasn’t enough, or were afraid that similar competitors’ models could outperform the M4, can now rest assured that the optimisations made by RaceChip are significant.