1949 Nations Grand Prix

Race details
Race 6 of 6 races in the 1949 Grand Prix motorcycle racing season
Date	4 September 1949
Location	Autodromo Nazionale Monza
Course	Permanent racing facility 6.30 km (3.91 mi)
500 cc
Rider Fastest lap Rider Nello Pagani Gilera Podium First Nello Pagani Gilera Second Arciso Artesiani Gilera Third Bill Doran AJS
250 cc
Rider Fastest lap Rider Dario Ambrosini Benelli Podium First Dario Ambrosini Benelli Second Gianni Leoni Moto Guzzi Third Umberto Masetti Benelli
125 cc
Rider Fastest lap Rider Gianni Leoni FB-Mondial Podium First Gianni Leoni FB-Mondial Second Umberto Masetti Moto Morini Third Umberto Braga FB-Mondial
Sidecar (B2A)
Rider Fastest lap Rider Eric Oliver Norton Time 86.7 mph (139.5 km/h) Podium First Ercole Frigerio Gilera Second Frans Vanderschrick Norton Third Albino Milani Gilera

The 1949 Nations Grand Prix was the fifth round of the 1949 Grand Prix motorcycle racing season. It took place at the Autodromo Nazionale Monza.

Italian rider Nello Pagani won the 500 cc race riding a Gilera from Arciso Artesiani and Bill Doran.

Despite Dario Ambrosini winning the 250 cc race, a fourth-place finish for Italian Moto Guzzi rider Bruno Ruffo was enough for him to win the 250 cc championship, the only championship in the first season with results close enough to be still in doubt at the final race.

500 cc classification

Pos	Rider	Manufacturer	Time	Points
1	Nello Pagani	Gilera	1:16:36.8	11
2	Arciso Artesiani	Gilera	+0.8	8
3	Bill Doran	AJS	+15.8	7
4	Guido Leoni	Moto Guzzi	+18.2	6
5	Bruno Bertacchini	Moto Guzzi	+31.2	6
6	Reg Armstrong	AJS	+1:03.6
15 finishers
[1][2]

250 cc classification

Pos	Rider	Manufacturer	Time	Points
1	Dario Ambrosini	Benelli	1:02:53.8	11
2	Gianni Leoni	Moto Guzzi	+32.6	8
3	Umberto Masetti	Benelli	+52.2	7
4	Bruno Ruffo	Moto Guzzi		6
5	Claudio Mastellari	Moto Guzzi		5
6	Bruno Francisci	Moto Guzzi
[2][3]

125 cc classification

Pos	Rider	Manufacturer	Points
1	Gianni Leoni	FB-Mondial	11
2	Umberto Masetti	Moto Morini	8
3	Umberto Braga	FB-Mondial	7
4	Renato Magi	Moto Morini	6
5	Nello Pagani	FB-Mondial	5
[2][3]