Autocar has learnt from a senior Porsche official that the company is already working on a lightweight Club Sport version of the C7S. However, a turbocharged model is being firmly ruled out at this point. The fact that this car is called a C7S suggests that a slightly cheaper model is probably at the planning stage already. Eventually, a cheaper, lower-power 3.2-litre C7 could be launched. It makes sense, though, to launch the most agile and capable version of the new coupé family first, especially as this car has to establish itself as the purest driver’s car in the four-model line-up.
Although the C7S shares its mid-engined understructure with the Boxster, Porsche engineers have made significant changes to allow the adoption of a fixed roof and liftback-style rear screen. Porsche designers have provided the C7S with a voluptuous shape and uniquely styled rear wings, but also included a number of classic styling cues from the 911, not least its tightly curved roof. Cost concerns ruled out a complete re-skin of the Boxster for the C7S, so the two cars share bonnet, front wings and doors. Subtle styling changes, such as uniquely shaped bumpers and chunkier side sills, ensure some differentiation between the two, but the major difference is the roof structure and small rear windows behind the doors – taped over in these spy pictures.There’s no news yet on whether the car will share its dashboard with either the cheaper Boxster or the more expensively finished 911.
As well as the standard manual transmissions, Porsche engineers are putting the final touches to a dual-clutch semi-auto unit similar to Volkswagen’s much-praised DSG gearbox.
All models will be rear-wheel drive; the mid-engined layout with its rear-mounted longitudinal transmission virtually rules out a four-wheel-drive system. The C7S uses the same basic MacPherson strut suspension as the Boxster, although there are myriad detailed changes to the geometry that promise to improve its dynamics even further. The prototype captured here, for example, is running greater negative camber at the rear than the soft-top, suggesting Porsche’s engineers are keen to improve upon the roadster’s already exemplary high-speed stability. Other changes such as unique springs, dampers and bushes are all designed to take advantage of the improved levels of rigidity inherent in the new car’s bodyshell.
The steering incorporates the recent developments brought to the Boxster with variable-rate assistance, offering a ratio that alters between 17.1:1 and 13.7:1 depending on the amount of lock applied.
As with the Boxster, this S version of the C7 will also come with the option of Porsche Active Suspension Management (PASM). It uses adaptive dampers that vary the damping through two settings – normal and sport. In sport mode, the engine management system also gives the throttle a sharper response.
The appearance of yellow brake callipers on the prototype pictured here suggests Porsche will fit the C7S with the 350mm diameter PCCB (Porsche Carbon Ceramic Brakes) discs and 19-inch wheels.
The C7S should be a scintillating drive in the very best of Porsche traditions. Tests at the Nürburgring circuit have seen early prototypes already matching the 911 Carrera’s lap time of 8min 15sec in the hands of the company’s expert test driver, Walter Rohrl.This can be attributed to the coupé’s lower centre of gravity, more compact dimensions and the huge benefit of not having the engine slung out behind the rear wheels.
With the fixed roof reducing the typical wind buffeting and engine noise experienced in the roadster at high speeds, the C7S also promises to be an exceptional proposition for long-distance touring. And owners won’t have to worry too much about skimping on their luggage, either. Together with a 150-litre compartment up front and 130-litre boot in the back, the new two-seater also receives a parcel shelf at the rear of the cabin that’s accessed via the liftback. This screen also opens remotely via a button on the key fob.