911 Targa 4

Performance

The latest 911 has a new generation of engines with direct fuel injection (DFI), and significantly more power. 345 hp is generated by the 3.6-liter boxer (horizontally-opposed cylinder) engine and 385 hp by the 3.8-liter power unit.

The results are outstanding performance and increased fuel efficiency and emission values. All made possible thanks to DFI, VarioCam Plus, an improved lightweight construction, reduced friction and a number of detailed technical solutions.

Braking system

Porsche brakes are renowned for their stopping power, setting the standards for deceleration and stability. They are designed to cope with extreme forces such as those experienced during hard braking.

The brake calipers have a monobloc aluminum construction. This makes them tough but light and enables a rapid response and release of the brake. The pedal travel is short and easy to modulate.

On the 911 Carrera models, the front and rear axles are host to a new generation of brakes with anodized black, four-piston aluminum monobloc calipers. The brake calipers are now even stiffer thanks to their closed-type design. The brake disc diameters are larger: 330 mm front and rear and the rear brake discs are 4 mm thicker – for even better braking performance.

The S models have four-piston aluminum monobloc calipers that are larger, reinforced and have a striking red painted finish. The front axle has larger brake pads and thicker brake discs.

All models have cross-drilled brake discs ensuring optimum braking in the wet. The discs are internally vented for rapid heat dispersal.

Other features include a powerful 10-inch brake booster for reducing pedal effort in the rear-drive models and integral air spoilers for enhanced air flow in the brake cooling ducts.

For even better braking performance with braking force support, a 9-inch tandem brake force amplifier is used on the all-wheel drive models.

Integrated dry-sump lubrication

The purpose of integrated dry-sump lubrication is to guarantee a reliable oil supply while reducing engine temperatures, even in sportily driven cars.

The oil reservoir is located inside the engine, making an external tank unnecessary. Four oil pumps remove the oil from the cylinder heads directly into the oil sump. A fifth pump in the oil sump directly supplies the lubricating points in the engine.

To prevent foaming, the oil is channelled through cylinders known as swirlpots. In this way, optimum lubrication is guaranteed at all times and the oil pressure is always maintained at the necessary level in order to ensure, for example, that hydraulic valve clearance compensation remains fully functional – a condition that is crucial to the power and emission characteristics of the engine.

To reduce power losses and increase efficiency, an electronically controlled oil pump supplies the lubricating points inside the engine as and when required. This means that the oil pump does not work so hard when there is less demand for lubrication. The benefits of an on-demand oil supply system are optimum efficiency, increased fuel efficiency and lower exhaust emissions.

Single-jet spray nozzles cool the piston crowns with oil from the main lubrication circuit – another detailed solution that helps to reduce the thermal load on the engine.

For the engine, all of these detailed solutions mean a consistent supply of oil regardless of gravitational loads, even in the most demanding track conditions.