Valentino Rossi
Kenny Roberts
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Valentino Rossi leads 5 of 5 categories. Our all-time ranking places Valentino Rossi at #2 and Kenny Roberts at #7.
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The case for Valentino Rossi
Nine world titles and 115 Grand Prix wins across 125cc, 250cc, 500cc and MotoGP, plus records that still stand for premier-class victories, 89, and premier-class podiums, 199, from 432 career starts over 26 seasons. Rossi won the last 500cc two-stroke title in 2001 and the first MotoGP four-stroke title in 2002, then made the defining move of the modern era: he joined a Yamaha that had not won a race in 2003, won first time out at Welkom in 2004 and took the championship, then repeated it in 2005. Titles followed again in 2008 and 2009. His durability is the outlier. He was still winning Grands Prix in 2017 at 38, seventeen years after his first premier-class win, and finished runner-up in 2015 after the most bitter title fight of the era. He also did more than anyone to turn MotoGP into a global commercial property.
The case for Kenny Roberts
Three consecutive 500cc world championships from 1978 to 1980, the first of them as a rookie, from a career of only 60 Grand Prix starts. Roberts took 24 wins, 22 in the premier class, and 44 podiums, having already won back-to-back AMA Grand National titles in 1973 and 1974 and completed the Grand Slam of victories across all five American dirt-track and road-race disciplines. His influence outweighs his totals. He imported dirt-track technique to Grand Prix racing, deliberately breaking rear traction to steer a 500cc two-stroke, and every rider since has ridden some version of that. Off track he was equally consequential: his threatened breakaway World Series in 1979 forced the FIM to improve circuit safety and lifted rider payments dramatically. He later ran his own team and built his own three-cylinder 500cc machine.