Alonso caught Lewis Hamilton, who started on the pole, early and controlled the pace the rest of the 56-lap race. The only time he trailed after that was when he made a pit stop but after this final stop, he passed Sebastian Vettel for the lead and held on over the final 13 laps.
He finished the race in 1 hour, 36 minutes, 26.945 seconds -- 10.1 seconds ahead of runner-up Kimi Raikkonen.
It was Alonso's 31st Grand Prix victory overall, which tied him with Nigel Mansell for fourth most all-time.
Vettel, however, continues to lead the drivers' standings by three points over Raikkonen and nine more than Alonso.
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UPI Sports Results for September 19, 2014