this latest supercar was snapped up by the likes of Steve McQueen and Princess Antoinette zu Furstenberg who was so excited at the prospect of her Turbo she flew directly to the factory in her private helicopter to pick it up

The awesome prototype Porsche 911 Turbo was first seen at the Paris motor show in 1973. It was an almost unbelievable monster of a car with hugely flared wheelarches, deep front spoiler and massive whale tail rear wing. It was bred out of the pure racing 2.1-litre Martini RSR Turbo which was launched at the same time. With lurid Seventies Turbo script written down its fat rear haunches, the Turbo instantly captured the attention of every sports car driver with its naked intent: speed.

At the time the world was in the depths of the oil crisis, which effectively killed the BMW 2002 Turbo and delayed the launch of the Mercedes-Benz 6.9 by a few years.   In Germany a blanket 60mph speed limit was imposed including the Nurburgring and Porsche’s own test track. But Porsche was run by engineer Ernst Fuhrmann and the Turbo was his idea, developed from Porsches almost total dominance of the CanAm racing series with its outrageous 1100bhp blown 917/30 sports racers. Fuhrmann was supported by his Finance director Heinz Branditzki (unusual for a bean counter!) who stated flatly, “If we are not in a position to sell such a superb product, then it’s time for us to get out of the sports car business.” Amen.

There had been a good deal of infighting at Porsche about where to position the 911 Turbo. The marketing department wanted a stripped out bare bones and therefore cheap Turbo that would sell on price. But Fuhrmann’s idea of a fully loaded, top-flight flagship for the entire Porsche range won over.

At the 1974 Paris motor show Porsche unveiled its first supercar, the production 911 Turbo. The outrageous Turbo, with a promise of 260bhp and a 180mph speedometer, was an immediate hit and demand outstripped supply. Fitted with lurid plaid and leather interior, deep cut-pile carpeting, electric windows, and optional air conditioning, as well as that wild sounding KKK turbocharger bolted to the engine, this latest supercar was snapped up by the likes of Steve McQueen and Princess Antoinette zu  Furstenberg who was so excited at the prospect of her Turbo she flew directly to the factory in her private helicopter to pick it up. The supercar for the Jet Set had arrived.

The 911 Turbo was extremely expensive when launched, costing twice the price of a regular 911. Fuhrmann’s desire to sell about 500 was trounced when a thousand were sold in short order. When the British press finally got behind the fat three spoke steering wheel of the Turbo they were, quite literally, blown away. Autocar wrote, “An outstandingly exciting motor car…” and Motor added it was, “the finest driving machine you can buy. When launched in America in 1975 Car and Driver called it, “ A Panzer among Porsches, a street racer that will guarantee you a place at the top of the pecking order in a way that not even a Ferrari or Lamborghini can,”

So why is it, up until now, that Porsche’s amazing 911 Turbo has been disregarded by classic 911 fanatics? Today you cannot find a half decent pre-impact 911 for less than £50K whereas a decent Turbo commands less than half of that. Basically it comes down to fashion, miss-information and ignorance.

Armchair Porsche racers now all clamour for the early short wheelbase 911 and 911S models because they are eligible for historic racing. True, specialists have today figured out how to sort out their near lethal handling – these cars were originally shod with skinny 165/15 tyres and Porsche had to resort to fitting lead weights in the bumpers in an attempt to quell the instant, snap oversteer – and real historic racers really know how to pedal them around a circuit. But the fashionisti still believe that the only classic Porsche worth having is a pre-1973 example of the lightweight variety.

Certainly, if you really are going historic racing or rallying then, yes, a 2-litre or 2.4S is a fabulous, lithe, lightweight driving machine (we’ll leave the stratospherically priced 2.7 RS out of this discussion). But to insist these classics are a better proposition than a Turbo as a fast and effective road car is ill advised.

A recent drive from London to Devon and back in an early Turbo was a revelation. In town the car felt heavy and slightly numb, due to its fat low profile tyres and lazy off-boost engine. But it was taught and remained calm threading through the busy London traffic. Onto the real-world motorway it instantly spooled up to the speed limit and loafed along in the most relaxed manner. The firm ride smoothed out and the most impressive aspect was how quiet the Turbo is at speed. Most elderly 911s induce earache on the motorway. The turbocharger, as well as adding a good deal of wham also effectively quietens the normally loud air-cooled engine.

Come fast country roads, the Turbo proved immense. Power up to a bend, the wonderful force of acceleration accelerating in an intoxicating manner, the car was then easily reeled in by the powerful disc brakes (yes, they are plenty powerful enough on public roads!) cornered quickly then whooshed along to the next corner with consummate and rapid ease. What a great Grand Tourismo the Turbo turned out to be. Of course, you do have to drive the car bearing in mind its turbocharged characteristics. Be in the right gear and allow the boost to build, don’t get the boost on in the middle of a corner and stick religiously to the slow-in-fast-out maxim and the Turbo behaves.