Richard Hammond has been handed the keys to an 850-hp Gunther Werks Turbo for the day. Sounds like a dream job — until you hear the catch.

Once Hammond has finished driving the $850,000 carbon-fibre Porsche 911 restomod, he has one crucial mission: deliver it in one piece to its next journalist, Jeremy Clarkson, at The Farmer’s Dog pub.

The Gunther Werks Turbo is hardly the sort of car you casually run down to the shops in. Beneath its beautifully reworked 911 bodywork sits a brutally powerful, turbocharged flat-six producing around 850 hp, while extensive carbon fibre keeps the weight down and the performance seriously high.

And now Hammond has to resist every temptation.

No heroic oversteer. No enthusiastic launch. No expensive dents. No excuses.

Just drive an $850,000, 850-hp Porsche across the country and hand it over to Clarkson without putting so much as a scratch on it.

What could possibly go wrong?

With Hammond behind the wheel and Clarkson waiting at the pub, absolutely nothing. Probably.