Johnny Dumfries, who was Ayrton Senna’s teammate at Lotus in 1986, has died at the age of 62 following a short illness.The Scotsman’s full name was John Colum Crichton-Stuart, 7th Marquess of Bute, but he raced under the name Johnny Dumfries and won the 1984 British Formula 3 championship, and...

Throughout 2014, here on Racer.com, we are outlining some of motorsport's greatest rivalries, mainly between drivers but also between teams, brands and even engine manufacturers. In the first installment of this series, RACER editor David Malsher looks at two bitter seasons that turned Nelson Piquet from a popular and uncomplicated...