Jethro Bovingdon tests a Porsche 911 GT3 RS 4.0 on the epic, desolate roads of the Scottish Highlands. On a rare sunny day, he's also joined by an iconic Carrera GT supercar to help him determine whether the 911 is the greatest Porsche of all time.

Jethro Bovingdon heads to the French Riviera to put a BMW M3 through its paces in the mountains above the Mediterranean. He's joined by rally legend Ari Vatanen, who attempt to convince him that the 30-year-old icon can still cut it in the Alps.