With more power and an updated chassis, Porsche will be launching two new 911 models in one fell swoop in July this year - an act last seen in 1977.

With more power and an updated chassis, Porsche will be launching two new 911 models in one fell swoop in July this year - an act last seen in 1977.

The 911 Carrera has a 239 kW 3,6-litre boxer engine and the 911 Carrera S is powered by a newly developed 3,8-litre engine, producing 261 kW.

With torque of 400 N.m, the S derivative surges to 100 km/h from standstill in 4,8 seconds. The Carrera reaches this benchmark in five seconds. Top speeds for the Carrera and Carrera S are 285 km/h and 293 km/h respectively.

Both 911 models come equipped with a new six-speed gearbox and a reworked chassis, with standard active suspension on the S model. Porsche’s Active Suspension Management is available on request.

In the “normal” mode, the suspension can be described as “sporty but comfortable”. Depressing the “sport” button firms the suspension, while sports suspension is an option on both models, lowering the car by a further 20 mm.

New design elements include circular headlights with additional lights in the nose area, more prominent fenders and a more aerodynamic rear spoiler.

Until now, Porsche has launched every new 911 as a single model and then increased the lineup throughout its model cycle.

Future additions to the 911 Carrera and Carrera S include the Carrera 4 and Cabriolet models in 2005, followed by a Turbo and Carrera 4S in 2006 and race-inspired GT3 and GT2 in 2007.

Local prices have yet to be confirmed.