New England Air Museum
Allison V-1710-81 (F20R)


The V-1710 is a V-12 liquid-cooled engine with 1,710 cubic inches of displacement and was the only American liquid-cooled engine to see service in World War II. Over 70,000 units were produced between 1931 and 1948.

The Allison Division of General Motors initiated the development of V-1710 in 1930 to meet the needs of the U.S. Army Air Corps for 1,000 hp engine for use a new generation of streamlined fighters and bombers. In various versions it produced up to 1,600 hp. The design allowed for  left- or right- hand rotation set up, easy changes of superchargers, and different drive-gear ratios on a single production line.

The U.S. Navy purchased the first V-1710's, the "B" model without a supercharger, for use on the Akron and Macon airships. The Army Air Corp purchased its first V-1710 in December 1932. The Depression slowed development and it was not until 1937 that it completed its Army Air Corp test program.

The "F" model, which includes this V-1710-81 variant (Allison model F20R), had a higher output, less frontal area and shorted overall length than earlier models.

Aircraft powered by the V-1710-81 include:

  • Curtiss P-40M and N Warhawk
  • Lockheed P-38 Lightning
  • North American P-51A Mustang

After the war, V-1710's became popular as a powerplant for hydroplane and racing boats, drag racers, land speed racers.

This engine is located in the Military Hangar on the wall near the 57th Fighter Group display.

If you have any information, comments on or recollections of the Allison V-1710 engine, please contact This e-mail address is being protected from spambots. You need JavaScript enabled to view it. .


Type: 12-cylinder, supercharged, "V" piston engine
Displacement: 1,710 cu. in.
Weight: 1,350 lbs.
Power Output: 1,125 hp at 3,000 rpm (max power)
Compression Ratio: 6.65:1
NEAM Id: 2


Engine Collection Index