Plot: Tiff Needell, Paul Woodman, and the team explore the past, present, and future world of cars, kicking off in the Welsh hills with two very different grand tourers: the Bentley Continental GT Speed and the Porsche 911 GT3 Touring In a nod to the past, Tiff drives the £1. 35m RML SWB, a modern take on the famous Ferrari 250 SWB, a time-warp machine from a company which knows a thing or two about building time-honored sports cars