Giacomo Agostini
Valentino Rossi
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Giacomo Agostini leads 3 of 5 categories. Our all-time ranking places Giacomo Agostini at #1 and Valentino Rossi at #2.
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The case for Giacomo Agostini
Fifteen world championships and 122 Grand Prix wins, neither total seriously threatened in fifty years. Agostini won eight 500cc titles, seven of them consecutively from 1966 to 1972, and seven 350cc crowns, frequently taking both on the same afternoon. His premier-class record reads 68 wins from around 120 starts, a strike rate above 55 percent that nobody in the modern era approaches, and he once won 20 consecutive premier races across 1968 and 1969, including a clean sweep of the 1968 season. The standard objection is machinery: MV Agusta's multi-cylinder fours were often the only genuinely competitive bikes on a thin grid. He answered it in 1975 by leaving MV for Yamaha and winning the 500cc title on a two-stroke at 33, the first two-stroke premier crown and the end of MV Agusta's seventeen-year run. He also won ten Isle of Man TTs before refusing to return after Gilberto Parlotti's death in 1972.
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.