New Porsche 911 to feature direct fuel injection

This summer, Porsche is introducing the next generation of the 911, with flat-six power units displacing 3.6 and 3.8-litres featuring Direct Fuel Injection (DFI), and the option of the Porsche Doppelkupplungsgetriebe (PDK) double-clutch transmission.

The four new 911 models - two Coupes and two Cabriolets - offer increased dynamic performance and good efficiency. With either a six-speed manual gearbox or the PDK transmission, the Carrera Coupe offers a fuel economy of 29.4mpg combined.

CO2 emissions of the 3.6-litre engine are down by up to 15 per cent to 225 g/km, thereby reducing vehicle excise duty and company car taxation costs.

Standard on the Cayenne V-engines since 2007, Porsche is now moving over to Direct Fuel Injection (DFI) for the flat-six engines in the 911 series.

As well as offering lower running costs, the direct fuel injection engines fitted in the 911 are also more powerful than the previous generation power units.

With fuel being injected fractions of a second prior to combustion, the engines respond more directly to even the slightest hint of acceleration.

Also, engine speed drops more quickly and smoothly since there is no residual fuel left in the intake manifold.

Unlike conventional intake manifold injection, DFI serves to form the fuel/air mixture directly in the combustion chamber. This better mixes the air and fuel in the cylinder, establishing a prerequisite for clean and complete combustion.

The new generation 911 is also available for the first time with the new Doppelkupplungsgetriebe (PDK), which translates as double-clutch gearbox.

Offering no less than seven forward gears, the new gearbox combines the driving comfort of a torque converter-equipped automatic transmission with the dynamic manual gearshift functionality of a sequential racing gearbox.

To use the various functions of the double-clutch transmission, the driver can either shift gears by means of toggles on the spokes of the new steering wheel, or via the gear selector lever.

The option of PDK costs £2,338, and the Sport Chrono Package Plus upgrade costs £729.