Porsche 911 GT3 RS vs GT3 vs Carrera | Battle of the 911s

How far does the new GT3 RS move the game on? Steve Sutcliffe finds out.

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Most Porsches, especially quicker 911s, tend to be defined by their engines. Not so the new £178,500 992 GT3 RS. For despite being propelled by one of the all-time great flat-six motors – one that revs to 9,000rpm and produces an ear-splitting 518bhp in the process – the latest RS is defined not by its incredible 4.0-litre flat-six unit but by its aerodynamics.

At its top speed of 184mph (14mph lower than a regular GT3’s because the gearing has been shortened to make it punchier on track) the RS produces a quite staggering 860kg of downforce when its electronically adjustable rear wing is fully deployed. It also features a new, huge single radiator in its nose that occupies what would normally be the luggage area, purely to accommodate two new underbody flaps, without which its almighty aerodynamic grip would simply never arrive.

So although that still spectacular engine has new cams and generates a touch more power than a regular GT3’s to give an even sharper 0-62mph time of just 3.2 seconds, the RS makes its biggest moves forwards courtesy of the amount of grip it generates and via the extra speed it can carry though corners – not down the straights that sit between them. To find out just how capable it is, we pit the new RS against a 911 GT3 Touring and a 911 Carrera in a series of challenges.

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