Curtis – Engine

Curtis – Engine

Clemons – Engine

Morton & Brett

Coleman

Joe Huff

Eddie Burbach

George Wingerter

James Patterson

Charles Moran

Harry Butcher

John Boling

Marion Trexler

Bill Denver

Joe Caccia

Stubby Stubblefield

Milton C. Jones

Phil Pardee

Paul Bost

Myron Stevens

Indianapolis 500 – 1931

Bugatti Type 44

Constant Knepper

Robert Vidal

Georges de Marotte

Grand Prix des Frontières – 1931

Alfa Romeo Tipo A

Francesco Pirola

Ferdinando Minoia

Gildo Strazza

Antonio Maino

Henri Frètet

Robert Sénéchal

Gran Premio d’Italia – 1931

André Schlumberger

Umberto Capello

Grimaldi

Grand Prix de Casablanca – 1931

Morano

Soriano-Pedroso

Sénéchal

François Miquel

Louis Abit

Diego Munoz

François Givaudan

Edmond Nebout

Ernest André

Jean Treunet

Grand Prix de Picardie – 1931

Salmson AL3

Carlo Gasparin

Salvatore Piccolo

Cesare Pastore

Luigi Pirandello

Targa Florio – 1931