A legend is back. Porsche today unveiled a modern interpretation of its legendary 1973 Carrera RS 2.7, complete with a 'ducktail' spoiler and ‘Fuchs-style’ custom alloy wheels. The new car is called the 911 Sport Classic and it’s set to grace the automaker’s stand at this month’s Frankfurt auto show.

The latest model will be limited to just 250 units worldwide when it goes on sale early next year and both right- and left-hand-drive models will be available.

Other unique elements of the car include its 'double bubble' roof, similar to the design seen on the Carrera GT supercar and some of Porsche’s racing cars, as well as a new front spoiler, bi-xenon headlamps with black surrounds and the Sport Chrono Package Plus.

Although based on the Carrera S, the 911 Sport Classic gets the 44 mm wider body of the Carrera 4S and a 400 horsepower version of the legendary 3.8-liter flat-six engine. The extra power is courtesy of a new intake and engine management system, as well as modified cylinder heads.

There is also the new variable-resonance intake system, featuring six vacuum-controlled flaps that optimize the oscillation of air in the intake manifold for a better cylinder charge. This ensures there is the perfect amount of air in the combustion chamber at all times to optimize torque, which peaks at 310 pound-feet at 4,200 rpm.

The end result is a 0-62 mph time of just 4.6 seconds and a top speed of 187 mph. Other modifications include a 20 mm suspension lowering kit, a limited-slip differential, and carbon-ceramic brakes.

Porsche’s new 911 Turbo S will become the fastest and most powerful 911 Turbo model ever when deliveries start in May.

The Turbo S badge has been used twice before, on limited-production run-out versions of the 993 and 996. This time, however, Porsche says the 997 Turbo S will be a model in its own right, sitting right at the top of the current range for the final two years of the 997’s production.

It has been created to meet demand from customers asking for the ultimate driver’s 911, and many of the options from the standard 911 Turbo are available as part of the list price.

Power from the 911 Turbo’s twin-turbocharged, 3.8-litre flat six engine has been increased in the Turbo S to 523bhp, up from 493bhp. Its torque output has also been increased by 37lb ft, to 516lb ft. Despite these increases, combined fuel economy remains at 24.8mpg.

Power is sent to all four wheels through a seven-speed PDK dual-clutch gearbox in conjunction with Porsche’s Traction Management system. Wheel-mounted paddle shifters are included as standard for the first time in a 911. Porsche’s Torque Vectoring system, which includes a mechanical limited-slip differential, is also standard.

The chassis is upgraded by the inclusion of the Sport Chrono package, which includes Launch Control and Dynamic Engine Mounts. These changes improve chassis rigidity, reduce vibration and help boost speed and acceleration. The Turbo S’s 0-62mph time is 3.3sec, 0.3sec faster than the Turbo’s. It can get from 0-124mph in 10.8sec and reach a top speed of 196mph.

Other standard features over the regular Turbo include Ceramic Composite Brakes, Dynamic Cornering Lights, sports seats with increased adjustability, 19in RS Spyder alloys wheels and two-tone leather seats.

Prices for the Turbo S start at £123,623 for the coupé and £130,791 for the cabriolet, respective price rises of £21,800 and £21,743 over the Turbo.

Its torque output has also been increased by 37lb ft, to 516lb ft.