Plot: REVIEWS: Jaguar R Coupe • Jaguar XKR-R • Aston Martin DB7 GT CHALLENGE: How far can you drive until you become bored in a Mark 3 Jaguar XJR A look at the iconic Jaguar MKII, the first car ever to have disc brakes and a badge on the back to warn drivers that it stopped quickly. There's a look at possible Jaguars of the future with the R Coupe concept car, whilst James drives the C Type Jaguar