The technology for the parallel full-hybrid version of the Porsche Cayenne (previously described by AEI) is now in its final stages of development. It is a dual Porsche-Volkswagen project, with the latter fitting the system to the Touareg.
The three-year program sees the companies sharing near-identical technology, and Porsche will use it for the forthcoming four-door Panamera GT that will be launched late this year.
VW facilitated a drive of the Touareg in near production prototype form. The production version is expected to return at least a 9.1 L/100 km combined fuel consumption with emissions below 210 g/km. The 0-100 km/h (0-62 mph) dash will take about 6.8 s, and top speed will be 240 km/h (149 mph). Towing capability is 3.5 t (3.9 ton).
Both the Porsche and VW use the supercharged 245-kW (329-hp) V6 3.0-L gasoline engine from the Audi S4. It produces 440 N·m (325 lb·ft) from 2900 to 5300 rpm and is allied to a 38-kW three-phase synchronous electric motor with 285-N·m (210-lb·ft) torque capability. An eight-speed automatic transmission is used for both cars. Maximum speed will be reached in sixth. A NiMH (nickel/metal hydride) battery is fitted measuring 347 x 633 x 291 mm (13.7 x 24.9 x 11.5 in).
A short test drive in the Touareg was impressive, although transmission shifts were at times jerky. This would be dealt with via software tuning, said Touareg Project Manager Dr. Jochen Böhle. Driven in an urban environment, the system demonstrated a smooth, linear transition between internal combustion and electric drive.
Böhle said that the full-hybrid technology could be used in other VW models; it will be fitted to the first-generation Porsche Panamera. The system can be downsized for smaller cars. Fuel consumption and emissions figures for the two SUVs may be further improved as thermal management of the engine is enhanced.