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Engine options, top speed, acceleration and refinement

Producing unfeasibly large numbers in unreasonably brief passages of time is largely the 911 Turbo’s reason for being.

Predictably, the range-topping 991 Turbo S does this better than any generation that preceded it. From a standing start, it will hustle to 170mph within a mile. If no deviation is required, the car will cover 1km in 20 seconds. It is, without question, extraordinarily fast.

I like the PDK. I like the gear selector, the aluminium paddles and the hefty yet seamless shift quality. In fact, I like it more than the manual

Such pace affords the Turbo S comparison with some of the quickest cars we’ve tested. Porsche will delight in the fact that, beneath 60mph, our timing gear shows the S variant to be marginally swifter than a Ferrari F12 (before the latter’s vast power overrides the former’s traction advantage).

At the core of those tiny fractions lies the flat six’s ability to churn through its PDK gearbox’s lower ratios with practically no let-up, combined with the cleverness and potency of its AWD-enabled launch control function.

To hold the Turbo S on its huge carbon-ceramic discs and then release it to catapult (there is no other word for it) forward in a venomous spin cycle of tyres, turbines, crank and incredulousness, is to experience the Turbo S at its most expressive.

Even here, though, the drama is doing rather than feeling. A split second in front of the F12 off the mark it may be, but where the Ferrari is a tumult of V12, the 911 lets fly with a flat, dissonant growl not much dramatised by either its extended 7200rpm red line or standard-fit sound symposer.

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Thus the Turbo S, for all its big-winged swagger, is a buttoned-down projectile more adept at providing effortless access to high speeds than showily involving you in it. In any gear save its long seventh, it is dismissively ballistic.

Not only is it 3.9sec quicker from 30-70mph in fourth than the Carrera tested, but it’s also almost 1.5sec swifter than the previous GT3 RS – itself a monster.

The standard Turbo model, despite a deficit of around 39bhp and 29lb ft, delivers similarly impressive performance. It is slightly slower from 0-62mph, but it's still devastatingly quick and utterly effortless.

Out on the road, and if you managed to overlook the Turbo S's 200rpm-higher redline, many would struggle to differentiate between the two.