Stuttgart Auto, the local distributor for Porsche cars, has launched two of the most iconic models from the stable of the sports car maker - the 911 GT3 and 911 Turbo. Unveiling both sports cars was Timo Bernhard, Porsche Works Driver and one of the few selected to pilot the marque's return to the 24 Hours of Le Mans this year.

911 GT3

As a road-legal car blessed with equally potent track prowess, the GT3 continues the longstanding tradition of being Porsche's ultimate road racer. Evolving from the latest generation of 911 (type 991), the GT3 is more accomplished than before.

For the first time, the flat-six engine features direct injection. Although it is based on the same block found in the 911 Carrera S, it shares only a few common parts. The 3.8-litre now has titanium connecting rods and forged pistons, with crankshaft and valve gear that are specially developed for the GT3. The result is 475bhp from an engine capable of revving up to 9,000rpm.

There are more figures that can lay proof to the GT3's dynamic performance, such as a power-to-weight ratio of 3.0kg/bhp, 0-100km/h in 3.5 seconds, and completing a round at Nurburgring Nordschleife in under 7 minutes 30 seconds.

Tasked to dispatch the power is Porsche's dual-clutch transmission - PDK - that has been tuned to provide dynamic performance and characteristics similar to the sequential gearbox from motor racing.

911 Turbo & 911 Turbo S

The Turbo and Turbo S are the most powerful members in the 991 series, with a 3.8-litre bi-turbo flat six engine that churns out no less than 520bhp and 560bhp respectively. With the latest generation of Turbo models, Porsche remains to be the only carmaker to offer two turbochargers with variable turbine geometry for a petrol engine.

The new flagships also come with a myriad of technologies more dynamic performance, such as new all-wheel drive, active rear axle steering (also found on the GT3) and adaptive aerodynamics.

Playing an equally important role is the new lightweight chassis design that has a 100mm longer wheelbase, matched with larger 20-inch wheels. This is also the first time that the Turbo models are wider than their all-wheel drive 911 stablemates - 28mm in specific.

There are a couple of tell tale signs separating the Turbo S from the Turbo variant, such as the track-inspired centre wheel hub locks, full LED headlamps with four-point daytime running lights, and Porsche Ceramic Composite Brake (PCCB) with yellow brake calipers.

At press time, the 911 GT3 will retail for $633,688 onwards, while prices for the 911 Turbo and 911 Turbo S will start from $716,288 and $849,388 respectively.