The 1991 Spanish motorcycle Grand Prix was the fourth round of the 1991 Grand Prix motorcycle racing season.

Wayne Rainey’s 3rd pole in 4 races; takes turn 1 from Mick Doohan, John Kocinski, Eddie Lawson and Kevin Schwantz.

Doohan wins with a large gap and Kocinski’s 2nd place takes 2 points from Rainey’s standing, so he's now 4 points behind Doohan.

Rainey says that his tire blistered and had to nurse it on the right-handers.

[2] Schwantz' Suzuki holed a piston while he was battling for 4th place.