In short, it's probably about as much speed as any human should be allowed to handle in one, £140k lump. Or, as we learn today, a £150k lump of ‘Exclusive GB Edition'.
Porsche is giving the UK some love with a limited run of 40 Porsche 911 Turbo S models replete with subtle details inspired by the classic 1974 Porsche Turbo (pic 5, above), a car that really, really doesn't like your ham-fisted approach to driving.
So, what do you get? A choice of three exterior colours (white, silver or red), high gloss black 20in Sport Classic alloys/wing mirrors/rear spoiler/door handles, a Union Jack flag on the glovebox, a SportDesign steering wheel with red stitching, some black leather, privacy glass and illuminated ‘911 Turbo S Exclusive GB Edition' lettering on the door sill.
Then there are the bespoke floor mats, carbon interior trim, and complementary accessories including a photo book and key pouch.
Oh, you'll also get that turbocharged 3.8-litre flat-six engine developing 553bhp and 553lb ft of torque with four-wheel-drive. It'll go from 0-62mph in 3.1 seconds and top out at 198mph. It'll also destroy your life and leave you a shell of being.
As mentioned, just 40 will be built, each costing £150,237.
Now watch one go up against the mighty 918 Spyder as part of Top Gear's Speed Week...