BMW M4 CS review
Inside, the M3 CS acquires the lightweight M sport seats and sport steering wheel from the M3 Competition Package. Borrowing a cue from the new M5, there’s also a new red starter button.
Despite the focus on performance, features such as BMW’s Professional navigation system, climate control air conditioning and a Harman Kardon sound system are fitted as standard, and the rear seats are retained. However, buyers can specify the new four-door with a series of unique Alcantara and leather accents as an option.
Overall, BMW M claims a 10kg reduction over the standard M3 at 1585kg. Although this is not a significant loss, insiders suggest the M3 CS’s centre of gravity is lower than that of the already heavily focused M3 Competition Package.
Power for the M3 CS comes from the same evolution of BMW M’s twin-turbo 3.0-litre straight-six petrol engine unveiled in the M4 CS. With 454bhp at 6250rpm and 443lb ft of torque from 4000rpm-5380rpm, the longitudinally mounted unit develops 29bhp and 37lb ft more than the motor used by the standard M3. It also packs 10bhp and 37lb ft more than the earlier evolution of the engine developed for the M3 Competition Package.
This endows the M3 CS with a power-to-weight ratio of 286bhp per tonne - some 20bhp per tonne more than the standard M3 and 8bhp per tonne more than the M3 Competition Package, according to BMW figures.
Power is channelled through a standard seven-speed dual-clutch gearbox and electronically controlled M differential to the rear wheels.
BMW quotes a 0-62mph time of 3.9sec, making the M3 CS the fastest-accelerating road-going M3 model yet. By comparison, the standard M3 has an official 0-62mph time of 4.1sec and the M3 Competition Package takes 4.0sec.