The Porsche 991 family is set to welcome two new all-wheel drive members – the 911 Carrera 4 and 4S, available in Coupe and Cabriolet forms. The all-paw duo will debut at next month’s Paris show.

All models have a seven-speed manual gearbox as standard, with the seven-speed PDK twin-clutch transmission as an option. The rear-end of the Carrera 4 houses a 350 hp 3.4 litre flat-six that’s good enough for 0-100 km/h in just 4.5 seconds (Cabriolet 4.7 sec) and a top speed of up to 285 km/h (Cabriolet 282 km/h).

The 4S gets a 3.8 litre lump with 400 hp, delivering 0-100 km/h in 4.1 seconds (Cabriolet 4.3 sec) and a top speed of 300 km/h. With that kind of firepower, who needs the Turbo?

The powertrains aren’t new, but they’re linked to the latest version of the active all-wheel drive Porsche Traction Management (PTM) system. Porsche says that while retaining the traditional RWD emphasis of the 911, the AWD chassis of the Carrera 4 and 4S delivers “increased traction, road-holding and dynamic performance over a wide variety of road surfaces and in all weather conditions.”

As usual, an identifying feature of the Carrera 4 and 4S are the wider rear wheel arches – compared to RWD Carreras, the “hips” extend outwards by 22 mm, and house rear tyres that are 10 mm wider. The signature red light band that connects the two taillights has also taken on a new form.

Inside, a new menu in the instrument cluster informs the driver how PTM distributes engine torque between the axles, in real time.

In conjunction with the duo’s unveiling, Porsche is introducing the option of Adaptive Cruise Control (ACC) – which controls distance to traffic ahead and vehicle speed – across the 911 model range. When ordered with PDK, the ACC system adds the safety function Porsche Active Safe (PAS), which can help prevent front-end collisions. A sliding glass sunroof is also now available as an option for all 911 CoupĂ© models.