Date

Site

Course

Distance
(Miles)

Winner

Car

Speed
(mph)

Speed
(kph)

03/17/91

Australia

Road

181.545

John Andretti

Lola-Chevrolet

81.953

131.862

04/14/91

Long Beach

Road

158.650

Al Unser Jr.

Lola-Chevrolet

81.195

130.643

04/21/91

Phoenix

Oval

200

Arie Luyendyk

Lola-Chevrolet

129.988

209.151

05/26/91

Indianapolis+

Oval

500

Rick Mears

Penske-Chevrolet

176.457

283.919

06/02/91

Milwaukee

Oval

200

Michael Andretti

Lola-Chevrolet

134.557

216.502

06/16/91

Detroit

Road

155

Emerson Fittipaldi

Penske-Chevrolet

78.824

126.828

06/23/91

Portland

Road

199.890

Michael Andretti

Lola-Chevrolet

115.208

185.370

07/07/91

Cleveland

Road

201.365

Michael Andretti

Lola-Chevrolet

117.763

189.481

07/14/91

Meadowlands

Road

182.550

Bobby Rahal

Lola-Chevrolet

95.551

153.742

07/21/91

Toronto

Road

183.340

Michael Andretti

Lola-Chevrolet

99.143

159.521

08/04/91

Michigan

Oval

500

Rick Mears

Penske-Chevrolet

167.230

269.073

08/25/91

Denver

Road

133

Al Unser Jr.

Lola-Chevrolet

69.576

111.948

09/01/91

Vancouver

Road

165.290

Michael Andretti

Lola-Chevrolet

93.888

151.066

09/15/91

Mid-Ohio

Road

199.300

Michael Andretti

Lola-Chevrolet

99.789

160.561

09/22/91

Elkhart Lake

Road

200

Michael Andretti

Lola-Chevrolet

126.205

203.064

10/06/91

Nazareth

Oval

200

Arie Luyendyk

Lola-Chevrolet

131.310

211.278

10/20/91

Laguna Seca

Road

185.980

Michael Andretti

Lola-Chevrolet

103.604

166.699

+The Indianapolis 500 was USAC-sanctioned, but counted toward the PPG Indy Car World Series title.