S4, E8: In Sicily, James goes for a ride on a nimble mountain goat (the Maserati quattroporte). Richard says goodbye to a motoring icon: the Rover V8 engine. Jeremy and Richard race a diesel car against a petrol car of similar power. Jeremy takes "The fastest car you can buy in the world today" (the Ford GT40) for a spin on the test track. Top Gear borrows a Boeing 747 to see whether a Ford Mondeo and a Citroen 2CV can withstand its crosswind. And actor Martin Clunes (Men Behaving Badly, Doc Martin, Reggie Perrin) behaves not badly in A Reasonably Priced Car.