The new Porsche 911 GT2 RS is big money for big thrills

Go shopping for a Porsche 911 GT2 RS and it could pay to make sure you're near a chair when the numbers start getting flashed around.

The price of entry for the pinnacle of Porsche performance is $645,000 – before you fork out thousands more for on-road costs and start tackling the options.

That's where things get interesting.

Even though it's one of the most expensive cars on the market, a reversing camera (standard on just about every new car) adds $1690 to the price. Floor mats are another $270.

And if you want the Weissach Pack – which brings more carbon fibre to shed 27kg from the already lightweight body - it'll be another $69,990, a price that includes a titanium roll cage.

By the time you've finished you could easily be writing a cheque north of $800K.

For that you don't even get a proper Porsche badge – it's a sticker that looks like the real thing but weighs marginally less, all in the pursuit of performance.

Harden up

Don't expect to be pampered for your substantial spend. Getting comfortable behind the wheel of the GT2 RS is an effort.

Deep bucket seats don't have anything like the padding of traditional car seats. Their large bolsters curve around your back and hips, locking you in place.

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As well as a regular three-point seatbelts that clip into a buckle, there are six-point racing harnesses (the passenger one costs another $1150) that comes down over your shoulders, across your hips and between your legs.

It holds you in far better than a regular seatbelt and all but renders the airbags useless (you're unlikely to be able to get close to the steering wheel, even in a crash), but needs adjusting to your size and shape before you click the five ends into the circular quick-release buckle.

Safer, then, but clunkier and more time consuming.

The backrests on the racing seats are not adjustable either, instead opting for a fixed angle that may not suit everyone; at least there is electric adjustment for the height.

Space restrictions

One of the appeals of Porsche's 911 is its relative practicality, at least compared with other supercars.

They have seating for four and a generous load area, hidden under the bonnet (the rear-mounted engine resides where the boot would normally be).

But the GT2 makes do with just the two front seats. And the rear is stuffed with roll cage, the metal posts and poles making it tricky to feed luggage in. Even the load area is compromised.

The small 115-litre luggage area under the bonnet has a small carbon fibre strip eating into its lower cavity. It holds five litres of distilled water, which is automatically sprayed on the intercoolers at the rear to lower temperatures, in turn boosting power.

Audio ecstasy

Modern cars are carefully designed to minimise noise from tyres, wind, exhausts and engines.

One of the most effective ways to do that is with sound deadening material, which absorbs the sound waves to reduce their effect.

But sound deadening adds weight. Given one of the key development goals of the GT2 RS was to reduce weight – making it faster – removing much of that noise suppression was an easy way to tick that box.

Under way, there's no getting away from the noise. Enormous Michelin tyres roar over bitumen at 80km/h or 100km/h, creating a constant din in the cabin.

Plus, you'll hear clunks and clangs from the rear as the gearbox and drivetrain makes things happen.

Even the brakes – with enormous carbon-ceramic discs to cope with higher temperatures, for better high-speed stopping – make a scraping noise at low speeds.

There's also the rush from the turbos, although that's not such a bad thing!

Drought buster

Better pray it's not raining, either.

With 515kW the GT2 is one of the most powerful cars on the road and it channels all that grunt through the rear wheels.

Even in the dry it can easily break traction, triggering the traction control to halt the wheelspin.

And those Michelin tyres are more about race track running than dealing with downpours.

While there are grooves to channel water away from a wet road, the tyres are optimised for dry conditions, their broad spread of sticky rubber ideal for cutting hot laps.

If it's raining, then, you're all but guaranteed to trigger the traction control, such is the thrust trying to channel itself through the rear tyres.

For the thrillseekers

So, why would you bother with the GT2? That all becomes apparent when you press the accelerator.

Few cars deliver the pace or thrills of the fastest 911 ever – and none do it with the flavour that defines a Porsche.

There's immense pull from the twin turbo 3.8-litre engine, enough to propel it to 100km/h in 2.8 seconds. Best to experience on a race track, then, so as not to risk your licence.

That's when the talents of the GT2 become blindingly apparent.

Phenomenal brakes arrest all that pace beautifully and it has the sort of balance yet playfulness that guarantee an entertaining (and fast) experience.

It's one of the fastest, most accomplished cars on the road – one that really needs its own race track to really experience its talents. Even with the finnicky on-road quirks.